Mechanics | Relativity Answers

A cyclist moves with a constant speed of 25 m/s as it passes over the top of a hill whose radius of curvature is 126 m. The mass of the cyclist and her cycle has a mass of 350 kg. Determine the apperant weight of the cyclist at the top of the hill.

A torque of 12 Nm is applied to a disk of radius 0.50m. If the disk accelerates at 5.7 rad/s^2 what is the mass of the disk?

A satellite rotates around mars at 1 revolution in 1.96 hours. How high above the mars surface is the satellite?

An egg is thrown upward from a point near a cornice of a tall building.It just misses the cornice on the way down and passes a point 120 ft below its starting point 5.00 sec after it leaves the thrower's hand. a. what is the initial speed of the egg? b. how high does it rise above its starting point?. c.what is the magnitude of its velocity at the highest point? d. what are the magnitude and direction of its acceleration at the highest point?

a car accelerates from rest at a constant rate a for sometime after which it decelerates at a constant rate b to come to rest .if the total time elapsed is t second evaluate a)the max. velocity b)the total distance travelled

The ceiling of a long hall is 25m high.What is the maximum horizontal distance that a ball thrown with a speed of 40ms-1 can go without hitting the ceiling of the hall ?

What do you mean by accuracy and precise and what are the error that might occur while calculating them?

why is it better to measure three times instead of once?

a train starting from rest picks up a speed of 20m/s in 200 seconds . it continues to move at the same speed for the next 500 seconds . it is then brought to rest next 100 seconds.
1. plot a speed time graph
2.calculate the rate of uniform acceleration.
3.calculate the distance covered by the train during retardation
4. calculate the average speed during retardation.

The speed of sound in air is 331 m/s. If you see a lightning flash and 8 seconds later, hear the thunder, how far was the lightning strike?