Mechanics | Relativity Answers

A ball of mass 0.150kg is dropped from rest from a height of 1.25m. It rebounds from the floor to reach a height of 0.960m. what impulse was given to the ball by the floor?

an apple drops from a tree and hits the ground in one second. what is it's speed upon striking the ground? what is the average speed during the one second? how high above ground was it when it's first dropped?

A simple pendulum 99.5 cm long is observed to have a period of 2.05 s at a certain place. Determine the acceleration of gravity at the place.

How much work was required to bring the 1000-kg roller coaster from point P to rest at point Q at the top of the 50-m peak?

A racing car accelerates uniformly through 3 gear changes with the following average speeds: 20m/s for 2s,40m/s for 2s,60m/s for 6s.What is the overall average speed?

what is speed classified as a scalar quantity and velocity classified as a vector quantity?

How does a vector quantity differ from a scalar quantity?

A 38g bullet is traveling at 428m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

I am unable to understanding about all the laws of Newton's motion please help me in understanding all the three laws of Newton's
Plz help me I am beginner in Physics Plz Help me!

An object is thrown vertically upwards from the surface of the earth, with a speed(VO). If its speed at a height (h) is(V),then show that

V0square - Vsquare=2GM/Rsquare(h/1+h/r) =2gh/(1+h/r)