A) \[0\,m/s\]
B) \[20\,\sqrt{2}\,m/s\]
C) \[20\,\sqrt{3}\,m/s\]
D) \[40\,m/s\]
Correct Answer: D
Solution :
Area of curve between the force and displacement axis \[=\frac{1}{2}\times (12+4)\times 10=80J\] In this time, body acquires the kinetic energy \[=\frac{1}{2}m{{V}^{2}}\] By the law of conservation of energy \[w=\Delta ke\] \[\Rightarrow \] \[\frac{1}{2}m{{V}^{2}}=80\,J\] \[\Rightarrow \] \[\frac{1}{2}\times 0.1\times {{V}^{2}}=80\] \[\Rightarrow \] \[V=40\,m/s\]You need to login to perform this action.
You will be redirected in
3 sec