Mechanics | Relativity Answers

A wire of cross-sectional area of 6x10-5mand length 50cm stretches by 0.2mm under a load of 3000N. Calculate the Young’s modulus for the wire

A horizontal force of 60N acts on a stationary snooker ball of mass 0.2kg.The cue is in contact with the ball for 8/s(0.008s).Calculate the speed of the ball after impact.

Suppose you hear a clap of thunder 14.2 s after seeing the associated lightning strike. The speed of light in air is 3.00 108 m/s.
(a) How far are you from the lightning strike? (The speed of sound waves in air is 343 m/s.)

If the IMA of a lever is 6, what do you know about the structure of the lever

what are the fundamental measures of a wave and how do they relate to each other

a lead bullet of mass 500 grams.(c=0.3 CGS units )moving at a speed of 210 m/s is suddenly stopped. Find the increase in temperature.

It is a speed time graph for the falling ball until it hits the ground

what does this mean
"the acceleration of the ball decreases" ?

A car moving at 100 km / hour, crashed into a concrete wall that doesn't move. How much time it takes to stop the car and how much its acceleration?

nb: I think this question isn't exhaustive/complete, but maybe you have another ideas. :)

a string of lenght L=120cm has a ball attached to one end and is fixed at its other end. when the initially stationary ball is released from the horizontal, what is the speed it reaches when it comes to its lowest point.

A ball of mass 2kg falls from rest from a height of 200m. Calculate its kinetic energy after falling a distance of 150m.