-
question_answer1)
A motorcycle and a car are moving on a horizontal road with the same velocity.
|
If they are brought to rest by the application of brakes, which provided equal retardation, then
|
A)
Motorcycle will stop at shorter distance done
clear
B)
Car will stop at a shorter distance done
clear
C)
Both will stop at the same distance done
clear
D)
Nothing can be predicted. done
clear
View Solution play_arrow
-
question_answer2)
A mass of 100 g strikes the wall with a speed of \[\text{5 m }{{\text{s}}^{-1}}\] at an angle as shown in figure and it rebounds with the same speed. If the contact time is \[2\times {{10}^{-3}}s,\] what is the force applied by the wall?
A)
\[\text{250}\sqrt{\text{3}}\,\,\text{N to right}\] done
clear
B)
\[\text{250 N to right}\] done
clear
C)
\[\text{250}\sqrt{3}\text{ N to left}\] done
clear
D)
\[\text{250 N to left}\] done
clear
View Solution play_arrow
-
question_answer3)
In a rocket, fuel burns at the rate of \[1\text{ }kg\text{ }{{s}^{-1}}\]. This fuel is ejected from the rocket with a velocity of\[60\text{ }km\text{ }{{s}^{-1}}\]. This exerts a force on the rocket equal to
A)
6000 N done
clear
B)
60000 N done
clear
C)
60 N done
clear
D)
600 N. done
clear
View Solution play_arrow
-
question_answer4)
Figure shows the displacement of a particle going along the x-axis as function of time. The force acting on the particle is zero in the region
A)
AB done
clear
B)
BC done
clear
C)
CE done
clear
D)
DE. done
clear
View Solution play_arrow
-
question_answer5)
A block of metal weighing 2 kg is resting on a frictionless plane. It is struck by a jet releasing water at the rate of \[1\text{ }kg\text{ }{{s}^{-1}}\] and at a speed of\[5\text{ }m\text{ }{{s}^{-1}}\]. The initial acceleration of the block is
A)
\[7.5\text{ }m\text{ }{{s}^{-2}}\] done
clear
B)
\[1.25\text{ }m\text{ }{{s}^{-2}}\] done
clear
C)
\[5\text{ }m\text{ }{{s}^{-2}}\] done
clear
D)
\[2.5\text{ }m\text{ }{{s}^{-2}}\] done
clear
View Solution play_arrow
-
question_answer6)
A hammer weighing 2.5 kg moving with a speed of \[1\text{ }m\text{ }{{s}^{-1}}\] strikes the head of the nail driving it 10 cm into the wall. The acceleration during impact and the impulse imparted to wall will be respectively
A)
\[-5m\text{ }{{s}^{-2}},\text{ }2.5\text{ }N\text{ }s\] done
clear
B)
\[-\text{ }10\text{ }m\text{ }{{s}^{-2}},\text{ }5\text{ }N\text{ }s\] done
clear
C)
\[-\text{ }7.5\text{ }m\text{ }{{s}^{-2}},\text{ }3.5\text{ }N\text{ }s\] done
clear
D)
\[-6m\text{ }{{s}^{-2}},\text{ }4\text{ }N\text{ }s\] done
clear
View Solution play_arrow
-
question_answer7)
Consider two spring balances hooked as shown in the figure. We pull them in opposite directions. If the reading shown by A is 1.5 N, the reading shown by B will be
A)
1.5 N done
clear
B)
2.5 N done
clear
C)
3.0 N done
clear
D)
Zero. done
clear
View Solution play_arrow
-
question_answer8)
Direction: Read the passage carefully and answer the following question.
|
An object of mass 1.5 kg travelling in a straight line with a velocity of \[5\text{ }m\text{ }{{s}^{-1}}\] collides with a wooden block of mass 5 kg resting on the floor.
|
This object sticks with wooden block after collision and both move together in a straight line.
|
The total momentum after collision is
A)
\[3.5\text{ }kg\text{ }m\text{ }{{s}^{-1}}\] done
clear
B)
\[1.5\text{ }kg\text{ }m\text{ }{{s}^{-1}}\] done
clear
C)
\[7.5\text{ }kg\text{ }m\text{ }{{s}^{-1}}\] done
clear
D)
\[2\text{ }kg\text{ }m\text{ }{{s}^{-1}}\] done
clear
View Solution play_arrow
-
question_answer9)
Direction: Read the passage carefully and answer the following question.
|
An object of mass 1.5 kg travelling in a straight line with a velocity of \[5\text{ }m\text{ }{{s}^{-1}}\] collides with a wooden block of mass 5 kg resting on the floor.
|
This object sticks with wooden block after collision and both move together in a straight line.
|
The velocity of the combination of these objects after collision is
A)
\[8.5\text{ }m\text{ }{{s}^{-1}}\] done
clear
B)
\[9.5\text{ }m\text{ }{{s}^{-1}}\] done
clear
C)
\[1.15\,\,m\,\,{{s}^{-1}}\] done
clear
D)
\[1.5\,\,m\,\,{{s}^{-1}}\] done
clear
View Solution play_arrow
-
question_answer10)
Which of the following options is correct?
(i) Force of gravitation on a body is equal to the true weight of the body. |
(ii) A person standing in an elevator moving downwards with constant acceleration finds his weight less than actual. |
A)
Only (i) is correct. done
clear
B)
Only (ii) is correct. done
clear
C)
Both (i) and (ii) are correct. done
clear
D)
Neither (i) nor (ii) is correct. done
clear
View Solution play_arrow
-
question_answer11)
A ball is rolling down a slope at a steady speed. Which of the following statements is correct?
A)
Frictional force is greater than the forward force. done
clear
B)
There is an unbalanced force downwards. done
clear
C)
There are no forces acting on the ball. done
clear
D)
The forces acting on the ball are balanced. done
clear
View Solution play_arrow
-
question_answer12)
Which of the following graphs shows the graph between velocity (v) and mass (m) when linear momentum (p) is constant?
A)
B)
C)
D)
View Solution play_arrow
-
question_answer13)
In the first second of its flight, a rocket ejects 1 /40 of its mass with a velocity of \[1200\text{ }m\text{ }{{s}^{-1}}\]. The acceleration of the rocket is
A)
\[20\text{ }m\text{ }{{s}^{-2}}\] done
clear
B)
\[30\text{ }m\text{ }{{s}^{-2}}\] done
clear
C)
\[40\text{ }m\text{ }{{s}^{-2}}\] done
clear
D)
\[60\text{ }m\text{ }{{s}^{-2}}\] done
clear
View Solution play_arrow
-
question_answer14)
Match column I with column II and select the correct option.
Column I | Column II |
(a) Flight of rockets | (i) Inertia of direction |
(b) Function of mud guards over the wheels of a motor bike | (ii) Inertia of rest |
(c) Firing a bullet from gun | (iii) Newton?s third law of motion |
(d) Dust particles fall when a durree is beaten with a stick | (iv) Law of conservation of linear momentum. |
A)
(a) - (iii); (b) - (i, ii); (c) - (ii); (d) - (iv) done
clear
B)
(a) - (ii); (b) - (iii); (c) - (i, ii); (d) - (iv) done
clear
C)
(a) - (iii, iv); (b) - (i); (c) - (iii, iv); (d) - (ii) done
clear
D)
(a) - (i); (b) - (ii); (c) - (iv); (d) - (iii, iv) done
clear
View Solution play_arrow
-
question_answer15)
Read the given statements and select the correct option.
Statement 1: If we push a massive truck parked along the roadside, it will not move. |
Statement 2: Two opposite and equal forces acted on two bodies in contact cancel each other. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
clear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
clear
C)
Statement 1 is true but statement 2 is false. done
clear
D)
Statement 1 is false but statement 2 is true. done
clear
View Solution play_arrow
-
question_answer16)
The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is
A)
24 N s done
clear
B)
20 N s done
clear
C)
12 N s done
clear
D)
6 N s done
clear
View Solution play_arrow
-
question_answer17)
Rahul is travelling in a bus moving at a constant speed of \[50\text{ }km\text{ }{{h}^{-1}}\]. At one point of his journey, he throws a ball vertically upwards to a height 40 cm, the ball will fall (Neglect air friction)
A)
A short distance behind where he is standing done
clear
B)
A long distance in front of where he is standing done
clear
C)
A long distance behind where he is standing done
clear
D)
At the same spot where he is standing. done
clear
View Solution play_arrow
-
question_answer18)
A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to halt after that. If the collision lasts for 10 s then
(i) The car will experience the greater force of impact exerted by the truck |
(ii) The truck will experience the greater momentum change |
(iii) Car will experience the greater average acceleration than truck. |
A)
Only (i) and (ii) are correct. done
clear
B)
Only (ii) and (iii) are correct. done
clear
C)
Only (iii) and (i) are correct. done
clear
D)
All (i), (ii) and (iii) are correct. done
clear
View Solution play_arrow
-
question_answer19)
Three identical bodies, each of mass m, are pushed by a force F on a frictionless table as shown in figure.
A)
Net force on X is F. done
clear
B)
Force applied by X on Y is\[\frac{F}{3}\]. done
clear
C)
Force applied by Y on Z is equal to net force on X. done
clear
D)
Net force on Y is equal to zero. done
clear
View Solution play_arrow
-
question_answer20)
Two blocks made of different metals identical in shape and size are acted upon by equal forces which cause them to slide on a horizontal surface. The acceleration of the second block is found to 10 times that of the first. What is the ratio of the mass of the second to the first?
A)
1 : 10 done
clear
B)
1 : 1 done
clear
C)
10 : 1 done
clear
D)
1 : 5 done
clear
View Solution play_arrow