Dhiren M Doshi Solutions for Chapter: Test Papers 1, Exercise 1: TEST PAPERS

State whether the following situation is possible or not and give an example for the case.

An object moving in a certain direction with acceleration in the perpendicular direction.

What do you understand by the term acceleration? When is acceleration positive and when is it negative? State the unit of acceleration in SI system.

Why do we get hurt more by failing on a concrete structure than on a sand track?

If someone jumps to the shore from a boat, the boat moves in the opposite direction. Explain?

 What are the applications of velocity-time graph? Use the applications to derive the different equations of motion. 

An object starting from rest travels $20 \mathrm{m}$ in first $2 \mathrm{s}$ and $160 \mathrm{m}$ in next $4 \mathrm{s}$. What will be the velocity after $7 \mathrm{s}$ from the start?

If action is always equal to reaction, explain how a horse can pull a cart?

A motor car of mass $1200 \mathrm{kg}$ is moving along a straight line with uniform  velocity of $90 \mathrm{km}/\mathrm{h}$. Its velocity is slowed down to $18 \mathrm{km}/\mathrm{h} \mathrm{in} 4 \mathrm{s}$ by an unbalanced external force. Calculate the acceleration and change in momentum. Also calculate the magnitude of the force required.