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question_answer1)
A particle of mass m moving eastward with a speed v collides with another particle of the same mass moving northward with the same speed v. The two particles coalesce on collision. The new particle of mass 2m will move in the north-easterly direction with a velocity [NCERT 1980; CPMT 1991; MP PET 1999; DPMT 1999, 2005]
A)
v/2 done
clear
B)
2v done
clear
C)
\[v/\sqrt{2}\] done
clear
D)
v done
clear
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question_answer2)
The coefficient of restitution e for a perfectly inelastic collision is [DPMT 1988]
A)
1 done
clear
B)
0 done
clear
C)
\[\infty \] done
clear
D)
? 1 done
clear
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question_answer3)
When two bodies stick together after collision, the collision is said to be
A)
Partially elastic done
clear
B)
Total elastic done
clear
C)
Total inelastic done
clear
D)
None of the above done
clear
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question_answer4)
A bullet of mass a and velocity b is fired into a large block of mass c. The final velocity of the system is [AFMC 1981, 94, 2000; NCERT 1971; MNR 1998]
A)
\[\frac{c}{a+b}\cdot b\] done
clear
B)
\[\frac{a}{a+c}\cdot b\] done
clear
C)
\[\frac{a+b}{c}.a\] done
clear
D)
\[\frac{a+c}{a}\cdot b\] done
clear
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question_answer5)
A mass of 10 gm moving with a velocity of 100 cm/s strikes a pendulum bob of mass 10 gm. The two masses stick together. The maximum height reached by the system now is \[(g=10\,m/{{s}^{2}})\] [MP PET 1993]
A)
Zero done
clear
B)
5 cm done
clear
C)
2.5 cm done
clear
D)
1.25 cm done
clear
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question_answer6)
A completely inelastic collision is one in which the two colliding particles
A)
Are separated after collision done
clear
B)
Remain together after collision done
clear
C)
Split into small fragments flying in all directions done
clear
D)
None of the above done
clear
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question_answer7)
A bullet hits and gets embedded in a solid block resting on a horizontal frictionless table. What is conserved? [NCERT 1973; CPMT 1970; AFMC 1996; BHU 2001]
A)
Momentum and kinetic energy done
clear
B)
Kinetic energy alone done
clear
C)
Momentum alone done
clear
D)
Neither momentum nor kinetic energy done
clear
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question_answer8)
A body of mass 2 kg moving with a velocity of 3 m/sec collides head on with a body of mass 1 kg moving in opposite direction with a velocity of 4 m/sec. After collision, two bodies stick together and move with a common velocity which in m/sec is equal to [NCERT 1984; MNR 1995, 98; UPSEAT 2000]
A)
1/4 done
clear
B)
1/3 done
clear
C)
2/3 done
clear
D)
¾ done
clear
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question_answer9)
A body of mass m moving with a constant velocity v hits another body of the same mass moving with the same velocity v but in the opposite direction and sticks to it. The velocity of the compound body after collision is [NCERT 1977; RPMT 1999]
A)
v done
clear
B)
2v done
clear
C)
Zero done
clear
D)
v/2 done
clear
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question_answer10)
In the above question, if another body is at rest, then velocity of the compound body after collision is
A)
v/2 done
clear
B)
2v done
clear
C)
v done
clear
D)
Zero done
clear
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question_answer11)
A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system [CPMT 1989; Kerala PMT 2002]
A)
Momentum is \[\frac{mvM}{M+m}\] done
clear
B)
Kinetic energy is \[\frac{m{{v}^{2}}}{2}\] done
clear
C)
Momentum is \[\frac{mv(M+m)}{M}\] done
clear
D)
Kinetic energy is \[\frac{{{m}^{2}}{{v}^{2}}}{2(M+m)}\] done
clear
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question_answer12)
A 50 g bullet moving with velocity 10 m/s strikes a block of mass 950 g at rest and gets embedded in it. The loss in kinetic energy will be [MP PET 1994]
A)
100% done
clear
B)
95% done
clear
C)
5% done
clear
D)
50% done
clear
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question_answer13)
Two putty balls of equal mass moving with equal velocity in mutually perpendicular directions, stick together after collision. If the balls were initially moving with a velocity of \[45\sqrt{2}\,m{{s}^{-1}}\] each, the velocity of their combined mass after collision is [Haryana CEE 1996; BVP 2003]
A)
\[45\sqrt{2}\,m{{s}^{-1}}\] done
clear
B)
\[45\,m{{s}^{-1}}\] done
clear
C)
\[90\,m{{s}^{-1}}\] done
clear
D)
\[22.5\sqrt{2}\,m{{s}^{-1}}\] done
clear
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question_answer14)
A particle of mass m moving with velocity v strikes a stationary particle of mass 2m and sticks to it. The speed of the system will be [MP PMT/PET 1998; AIIMS 1999; JIPMER 2001, 02]
A)
\[v/2\] done
clear
B)
2v done
clear
C)
\[v/3\] done
clear
D)
3v done
clear
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question_answer15)
A moving body of mass m and velocity 3 km/h collides with a rest body of mass 2m and sticks to it. Now the combined mass starts to move. What will be the combined velocity [CBSE PMT 1996; JIPMER 2001, 02]
A)
3 km/h done
clear
B)
2 km/h done
clear
C)
1 km/h done
clear
D)
4 km/h done
clear
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question_answer16)
If a skater of weight 3 kg has initial speed 32 m/s and second one of weight 4 kg has 5 m/s. After collision, they have speed (couple) 5 m/s. Then the loss in K.E. is [CPMT 1996]
A)
48 J done
clear
B)
96 J done
clear
C)
Zero done
clear
D)
None of these done
clear
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question_answer17)
A ball is dropped from height 10 m. Ball is embedded in sand 1 m and stops, then [AFMC 1996]
A)
Only momentum remains conserved done
clear
B)
Only kinetic energy remains conserved done
clear
C)
Both momentum and K.E. are conserved done
clear
D)
Neither K.E. nor momentum is conserved done
clear
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question_answer18)
A metal ball of mass 2 kg moving with a velocity of 36 km/h has an head on collision with a stationary ball of mass 3 kg. If after the collision, the two balls move together, the loss in kinetic energy due to collision is [CBSE PMT 1997; AIIMS 2001]
A)
40 J done
clear
B)
60 J done
clear
C)
100 J done
clear
D)
140 J done
clear
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question_answer19)
A body of mass 2kg is moving with velocity 10 m/s towards east. Another body of same mass and same velocity moving towards north collides with former and coalsces and moves towards north-east. Its velocity is [CPMT 1997; JIPMER 2000]
A)
10 m/s done
clear
B)
5 m/s done
clear
C)
2.5 m/s done
clear
D)
\[5\sqrt{2}\,m/s\] done
clear
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question_answer20)
Which of the following is not a perfectly inelastic collision [BHU 1998; JIPMER 2001, 02; BHU 2005]
A)
Striking of two glass balls done
clear
B)
A bullet striking a bag of sand done
clear
C)
An electron captured by a proton done
clear
D)
A man jumping onto a moving cart done
clear
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question_answer21)
A mass of 20 kg moving with a speed of 10m/s collides with another stationary mass of \[5kg.\] As a result of the collision, the two masses stick together. The kinetic energy of the composite mass will be [MP PMT 2000]
A)
600 Joule done
clear
B)
800 Joule done
clear
C)
1000 Joule done
clear
D)
1200 Joule done
clear
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question_answer22)
A neutron having mass of \[1.67\times {{10}^{-27}}kg\] and moving at \[{{10}^{8}}m/s\] collides with a deutron at rest and sticks to it. If the mass of the deutron is\[3.34\times {{10}^{-27}}kg\]then the speed of the combination is [CBSE PMT 2000]
A)
\[2.56\times {{10}^{3}}m/s\] done
clear
B)
\[2.98\times {{10}^{5}}m/s\] done
clear
C)
\[3.33\times {{10}^{7}}m/s\] done
clear
D)
\[5.01\times {{10}^{9}}m/s\] done
clear
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question_answer23)
The quantity that is not conserved in an inelastic collision is [Pb. PMT 2000]
A)
Momentum done
clear
B)
Kinetic energy done
clear
C)
Total energy done
clear
D)
All of these done
clear
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question_answer24)
A body of mass 40kg having velocity 4 m/s collides with another body of mass 60kg having velocity 2 m/s. If the collision is inelastic, then loss in kinetic energy will be [Pb. PMT 2001]
A)
440 J done
clear
B)
392 J done
clear
C)
48 J done
clear
D)
144 J done
clear
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question_answer25)
A body of mass \[{{m}_{1}}\]is moving with a velocity V. It collides with another stationary body of mass \[{{m}_{2}}.\] They get embedded. At the point of collision, the velocity of the system [DCE 1999, 2001]
A)
Increases done
clear
B)
Decreases but does not become zero done
clear
C)
Remains same done
clear
D)
Become zero done
clear
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question_answer26)
A bullet of mass m moving with velocity v strikes a block of mass M at rest and gets embedded into it. The kinetic energy of the composite block will be [MP PET 2002]
A)
\[\frac{1}{2}m{{v}^{2}}\times \frac{m}{(m+M)}\] done
clear
B)
\[\frac{1}{2}m{{v}^{2}}\times \frac{M}{(m+M)}\] done
clear
C)
\[\frac{1}{2}m{{v}^{2}}\times \frac{(M+m)}{M}\] done
clear
D)
\[\frac{1}{2}M{{v}^{2}}\times \frac{m}{(m+M)}\] done
clear
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question_answer27)
In an inelastic collision, what is conserved [DCE 2004]
A)
Kinetic energy done
clear
B)
Momentum done
clear
C)
Both (a) and (b) done
clear
D)
Neither (a) nor (b) done
clear
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question_answer28)
Two bodies of masses 0.1 kg and 0.4 kg move towards each other with the velocities 1 m/s and 0.1 m/s respectively, After collision they stick together. In 10 sec the combined mass travels [Pb. PET 2003]
A)
120 m done
clear
B)
0.12 m done
clear
C)
12 m done
clear
D)
1.2 m done
clear
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question_answer29)
A body of mass 4 kg moving with velocity 12 m/s collides with another body of mass 6 kg at rest. If two bodies stick together after collision, then the loss of kinetic energy of system is [J&K CET 2005]
A)
Zero done
clear
B)
288 J done
clear
C)
172.8 J done
clear
D)
144 J done
clear
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question_answer30)
Which of the following is not an example of perfectly inelastic collision [AFMC 2005]
A)
A bullet fired into a block if bullet gets embedded into block done
clear
B)
Capture of electrons by an atom done
clear
C)
A man jumping on to a moving boat done
clear
D)
A ball bearing striking another ball bearing done
clear
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