Mechanics | Relativity Answers

An African Elephant can reach heights of 13 feet and possess a mass of as much as 6000kg. Determine the weight of an African Elephant in Newtons and in pounds. (Given:1.00N = .225 pounds)

This is a Newtons Law Problem.

What's the difference between elastic and inelastic collisions? Is momentum always conserved in both scenarios?

a 4 legged 245 kg platform is supported by posts at each corner. What is the force on each post?

a 12 kg box slides down a 30.0 degree ramp with an acceleration of 1.4 m/s^2. If the frictional force is 11N what is the applied force?

Janet jumps off a diving platform with a horizontal velocity of 2.12 m/s & lands in the water 1.7 s later.
How high is the platform?The acceleration of gravity is 9.8 m/s2

sum of two forces is 8 kg wt. the magnitude of resultant of two forces is 4 kg wt. and it is at right angles to the smaller force. find the forces.

a car going a speed of 44 m/s drops a rock from a
height of 2.2 m How far from the point of the drop will the rock hit the ground?The acceleration of
gravity is 9.8 m/s2

A person walks 49 m East and then walks
35 m at an angle 41 North of East.
What is the magnitude of the total dis-
placement?

If an object is near the surface of the earth, the variation of its weight with distance from the centre of the earth is negligible. The weight of an object at sea level is given as mg. Given that the acceleration due to gravity at sea level is 9.81 m/s2 and the radius of the earth is 6370km, at what height above the surface does the weight decrease to 0.99 mg? What will be the value of g at that height?

a football coach starts at the 35 yard-line and walks to the 15-yard line. He turns around and walks to the 40-yard line. He turns around again and walks back to the 0-yard line. He turns around one more and walks back to the 25-yard line thus completing his 10 min of pacing. The coachs average speed is