You are helping a friend move furniture. The friend asks you to stand inside the back of a pickup truck to hold a piano because there is no rope available to tie it to the truck. Explain why you should refuse this request.

Explain why passengers should wear seat belts in cars and coaches.

Does rubber in the extension-Ioad graph obey Hooke's law? Explain.

when a horse pulls on a cart, the cart pulls back with an equal force on the horse. If, in fact, the cart pulls back on the horse as hard as the horse pulls forward on the cart, how is it possible for the horse to move the cart?

A sailing boat has a forwards force of 300 N from lhe wind in its saiIs. It is travelling at a constant speed. What is the total force acting on Ihe sailing boat? Explain your answer.

Explain why Formula 1 racing cars have low masses.

Determine the reaction force involved when a ball is hit with a racquet with a force of 100 N west.

Explain why a gun recoils backwards when fired.

On which factors force of friction depends?

Explain why when you are swimming you have to push water backwards so that you can move forwards.

Explain why two objects dropped on the Moon will accelerate at the same rate, even when they have different masses.

The same force is used to accelerate a small car and a monster car. Whal will be different about their motions? Explain your answer.

Explain why you cannot walk easily on icy ground.