Answer to Question #143631 in Classical Mechanics for Rainers

Question

Hi i have this physics test and i really need someones help please
I translated from google translator so if you have question write to my email
At what speed does the body have to be pushed vertically upwards so that it has a speed of 5 m / s at a height of 10 m?

What is the acceleration of the body if the speed decreases from 14 m / s to 36 km / h in 2 seconds.

The grinder makes 40 revolutions in 80 seconds. Determine the rotation period and frequency of the grinding wheel.

When a force of 50 N is applied to the spring, it stretches by 10 cm. What is the coefficient of spring stiffness?

A lift with a mass of 600 kg moves down at a steady acceleration and goes 64 m in 8 seconds. What is the tensile force of the elevator ropes?

Answer 1

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