A P Shreelatha and Neetu Singh Solutions for Chapter: Force and Laws of Motion, Exercise 6: EXERCISES

The resultant of all forces acting on a body is not zero. What is the type of force?

If the net force acting on a body is zero, will the body remain necessarily at rest?

The velocity-time graph of a body moving on a horizontal surface is shown in the adjoining figure. The mass of the body is $20 \mathrm{g}$. How much force does the surface exert on the body to bring it to rest?

A load of 100 N is applied at one end of a spring balance and an equal load is applied at the other end at the same time. What is the reading on the balance?

A wooden trolley of mass $3 \mathrm{kg}$ is mounted on wheels on horizontal rails. Neglecting friction and air resistance, what will be the final velocity of the trolley if a bullet of mass $2 \mathrm{g}$ is fired into it with a horizontal velocity of $800 \mathrm{m}/\mathrm{s}$ along the direction of the rails.

A rubber ball of mass $0.25 \mathrm{kg}$ is thrown against a wall. It strikes the wall normally with a velocity of $50 \mathrm{m}/\mathrm{s}$ and rebounds with the same speed in the opposite direction. Calculate the impulse of the force exerted by the wall on the ball.

Two blocks of mass $m_1=1 \mathrm{kg}$ and $m_2=2 \text{kg}$ are placed in contact on a frictionless horizontal surface. A force of $10 \text{N}$ is acting on $m_1$. What is the acceleration of $m_1$ and $m_2$. What is the value of action and reaction between the blocks?

A constant retarding force of $100 \mathrm{N}$ is applied to a body of mass $60 \mathrm{kg}$ moving initially with a speed of $18 \mathrm{km}/\mathrm{h}$. How long does the body take to come to halt?