Mechanics | Relativity Answers

If greatest admissible acceleration of a train is 3 feet per second square, calculate the least time taken from one station to another at a distance of 10m. plse ans this quickly..........

An arrow is fired horizontally from the top of a 40.0-m vertical cliff and lands 125 m away. Therefore the arrow was fired at _____ m/s.

Use the density formula to solve the following problems:

Calculate the density of a material that has a mass of 52.497 g and a volume of 18.5 cm3.

1. A train travels 20 km at a uniform speed of 60 kmph and the next 20 km at a uniform speed of 80 kmph. Calculate the average speed?

2. A bus travels 40 km at a speed of 50 kmph and next 4 m at a speed of 30 kmph. Calculate its average speed?

Squal goes up to his ceiling using a 10 m rope suspended from the top. If he is 55 kg in mass and it takes him 3.2 seconds to reach the ceiling. How much power is he exerting in climbing? (approximate g at 10 m/s2)

Two ends of a train moving with a constant acceleration pass a certain point with velocities u and v. What is the velocity with which the middle point of the train passes the same point?

A car travelling at 60 km/h overtakes another car travelling at 42 km/h . assuming each car to be 5 .0 m long. Find the time taken during the overtake.

A ball is dropped from a height of 5 m onto a sandy floor and penetrates the sand up to 10 cm before coming to rest. Find the retardation of the ball in sand assuming it to be uniform.

A juggler throws balls into air, He throws one whenever s highest the previous one is at its highest point. How high do the ball rise if he throws n balls each sec? acceleration due to gravity is g.

A person sitting on the top of a tall building is dropping ball at regular intervals of one second . find the positions of 3rd , 4th and 5th ball when the 6th ball is being dropped.