Subject Experts Solutions for Chapter: Force and Laws of Motion, Exercise 1: Target Exercise

A driver accelerates his car first at the rate of $1.8 {\mathrm{ms}}^{-2}$ and then at the rate of $1.2 {\mathrm{ms}}^{-2}$. The ratio of the force exerted at by the engines will be respectively equal to

A body of mass $m$ collides against a wall with velocity $v$ and rebounds with the same speed. The change in momentum is 

You are marooned on a frictionless horizontal surface cannot exert any horizontal force by pushing against the surface. How can you get out of it ? 

The masses of 10 Kg and 20 Kg respectively are connected by a massless spring. A force of 200 N acts on 20 Kg mass. At the instant shown, the 10 Kg mass has an acceleration of $12 m{s}^{-2}$. What is the acceleration of 20 Kg mass? 

A rocket can go vertically upwards in earth's atmosphere because

In which of the following case force may not be required to keep 

A single horizontal force $F$ is applied to a block of mass $M_1$ which is in contact with another block of mass $M_2$. If the surface are frictionless, the force between the block is

Figure shows the displacement of a particle going along the x-axis as a function of time. The force acting on the particle is zero, in the region

(i) AB   (ii) BC    (iii) CD    (iv) DE