It is easier to keep your balance on a moving bicycle than on a bicycle at rest". Why ?

"It is easier to make a body roll over a surface than to slide". Why ?

When you push your bicycle up on an incline the potential energy of the bicycle and yourself increses. Where does this energy come from?

Which of the following statements is incorrect? A. a cricketer moves his hands backwards while holding a catch B. A person falling from a certain height receives more on a heap of sand injuries when he falls on a cemented floor than when he falls C. It is easier to push a lawn mower than to pull it D. Mountain roads are generally made winding upwards rather than going straight up

A body of mass 25 kg is at rest on a horizontal surface. Minimum horizontal force required to just start motion is 73.5N and a force of 49N is needed to keep the body moving with a constant velocity. What is the coefficient of (i) static friction and (ii) kinetic friction ?

A body suspended on a spring balance in a ship weighs W_(0) when the ship is at rest. When the ship begins to move along the equator with a speed v , show that the scale reading is very close to W_(0) (1+-2omegaV//g ), where omega is the angular speed of the earth.

Is a large brake on a bicycle more effective than a small one ?

Why is it easier to push a heavy block from behind than to press it on the top and push?

A20 kg block is initally at rest. A 75 N force is required to set the block in motion. After the motion starts, a force of 60 N is required to keep the block moving with constant speed. The coefficient of static friction is

A 20 kg block is initially at rest. A 75 N force is required to set the block in motion. After the motion a force of 60 N is applied to keep the block moving with constant speed. The coefficient of static friction is

Bharath went to his grandfather’s house in winter this year. As usual he went for fishing. His grandmother told him there will be no fishes in the lake. He noticed that it was more difficult to find fishes in winter. The fishes were deep inside the river. Whereas in summer they were on the surface and hence he was able to catch fishes. (a) Why are fishes on the surface in water than in the depth in summer? Srisha wanted to keep ice creams without melting. So he had to keep it on ice taken in a container. His grandmother advised him to pour salt on the ice. (a) Why? (b) What value can be derived from this?