Syafiqa

A rope that is at 35° to the horizontal is used to pull 10kg crate across a rough floor. The crate is initially at rest and is dragged for a distance of 4.0m. The tension in the rope is 60N and the frictional force opposing the motion is 10N. A) Calculate...

A) Calculate the kinetic energy of a 5.0g bullet travelling with a velocity of 400^ms-1. B) Calculate the gravitational potential energy relative to the ground when a bird of mass 105g is 400m above the ground.

What net braking force must be applied to stop a car with a mass of 900 kg initially travelling at a velocity of 100 km/h within a straight-line distance of 50 m?