Lakhmir Singh and Manjit Kaur Solutions for Chapter: Force and Laws of Motion, Exercise 3: Long Answer Type Questions

Calculate the change in momentum of a body weighing $5 \mathrm{kg}$ when its velocity decreases from $20 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{s}$}\right.$ to $0.20 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{s}$}\right.$.  

State the various effects of force.

Give one example for a force stops a moving body.

Give one example where a force changes the speed of a moving body.

Give one example for a force changes the direction of a moving body.

Give one for a force changes the shape (and size) of a body.

What type of forces, balanced or unbalanced, act on a rubber ball when we press it between our hands? What effect is produced in the ball?

Why are road accidents at high speeds very much worse than road accidents at low speeds ?