Mechanics | Relativity Answers

As a tennis ball is struck, it departs from the racket horizontally with a speed of . The ball hits the court at a horizontal distance of 19.6 m from the racket. How far above the court is the tennis ball when it leaves the racket?

Petrol engine output of 20kw and uses 4.5kgvof fuel for each hour of running.The energy given out when 1kg of petrol is burnt 4.8x10^7J

A sailor pushes a 100.0 kg crate up a ramp that is 3.00 m high and 5.00 m long onto the deck of a ship. He exerts a 650.0 N force parallel to the ramp. What is the mechanical advantage of the ramp? What is the efficiency of the ramp? Your response should include all of your work and a free-body diagram

Car 1 is parked when it is hit by Car 2. The momentum of Car 2 before the collision was 50 kg m/s. The momentum of Car 1 after the collision is 10 kg m/s. What is the momentum of Car 2 AFTER the collision?

A bug completes one lap along the edge of
a circular planter of radius 23.6 cm in 17.59 s.
How fast was it traveling?

A car initially at rest undergoes uniform acceleration for 6.32 seconds and covers a distance of 120 meters. What is the approximate acceleration of the car?

Explain in detail the causes of tsunami. Also mention the precautions needed to be taken to minimize the damage.

A ball is thrown vertically into the air with an initial speed of 22.8 m/s. During its flight at one instant the ball was observed to be moving with a velocity of -16.1 m/s. Calculate the elapsed time between these two velocities. Round your answer to three significant digits.

whats the center of mass

due to continental drift the north American and European continent are drifting apart at an average speed of about 3 cm per year at this be how long in years will it take for them to drift apart by another 1450 m?