Mechanics | Relativity Answers

A toy motor car goes two rounds a second in a cicular way that has 0.3m rad.Find the angular velocity,periodic time and the speed of the car.
If the car goes in a circular way that has a 0.4m rad with a 2ms-1 velocity, find the velocity of the car

A daredevil jumps a canyon 12 m wide. To do
so, he drives a car up a 10 incline.
What minimum speed must he achieve to
clear the canyon?
The acceleration of gravity is 9.81 m/s2 .
Answer in units of m/s

an accererlating force of 500N changes an object from 40 m/s to 60 m/s in a distance of 100m. the mass is 25 kg determine the force of friction acting opposite this force.

A young boy swings a yo-yo horizontally above his head so that the yo-yo has a cen- tripetal acceleration of 250 m/s2.
If the yo-yo’s string is 0.14 m long, what is the yo-yo’s tangential speed?
Answer in units of m/s

So I have to tell that my english isn't to good , so i will be able to explain exacly what i need if that will be needed
1) how big power do you need to use to make 1 kg body fly up to 50 meters ?

The question I have, has to do with relativity (or so I think).

Imagine a fighter jet with two pilots travelling at twice the speed of sound.

I would imagine that if the pilot R (rear seat) throws a tennis ball at Pilot F(front seat), it will hit pilot F as the ball was already travelling at mach 2 and it was further boosted by pilot R. (please correct me if I am wrong).

Will it be the same if pilot R shouts at pilot F.(does sound waves act just like the tennis ball relative to the speed of the jet aircraft?)

The muzzle velocity of an armor-piercing round fired from an M1A1 tank is 1770 m/s (nearly 4000 mph or mach 5.2). A tank is at the top of a cliff and fires a shell horizontally. If the shell lands 6520 m from the base of the cliff, how high is the cliff?

A trunk with a weight of 210 N rests on the floor. The coefficient of static friction between the trunk and the floor is 0.40, while the coefficient of kinetic friction is 0.29. What is the minimum magnitude for a horizontal force with which a person must push on the trunk to start it moving?

Adam is riding forward on electric scooter at 10m/s. He throws a ball to Robert , who is stationary. The ball travels at a speed of 8 m/s relative to Adam. How fast is the ball moving relative to Robert as he tries to catch it?

Tom and Jill are both robots that are going to have a race. Both start from rest. Tom has a constant acceleration for the entire run, while Jill does the following; first she accelerated for a time of 2.00 minutes(convert to seconds) at a rate of 2.20cm/s/s ( must convert to meters), then runs a distance of 18.9 kilometers reaching a final velocity of 23.7 m/s, thetn decelerates at a rate of 2.3m/s/s, finishing the race with a velocity of 6.00m/s.

If Tom ties with Jill, what would have to be his final velocity?