Mechanics | Relativity Answers

A penguin slides down a 12m slope. If it takes the penguin 4s to reach the bottom, What was the penguin's velocity?

A man is sliding a 50 kg box across the floor with a normal force of 500 N. The floor is very rough, and the friction force is 450 N. What is the net force?

when trying to find the best way to define a force scale using rubber bands, which is best; using 1 rubber band and measuring each centimeter as a unit or force, or using multiple rubber bands that are parallel with each other? and why?

Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to three times the earth's radius of 6.38 106 m.

A, B and C participated in a race around a circular track. A and B run in the same direction while C runs in the opposite direction. If the speeds of A, B and C are 10 m/s, 20 m/s and 30 m/s respectively, and the length of the track is 1000m, then after how long will they take to meet for the first time
125 seconds
100 seconds
200 seconds
150 seconds

Natalya Lisovskaya set a track and field record in 1987 when she put the shot so that its horizontal displacement was 22.63 m. Assume that the angle of the initial velocity of the shot was such that it maximized the range, and for simplicity, assume the height of the ball when it landed was the same as the height at which it left her hand. If she were to put the shot vertically with the same speed, what is the maximum height above her hand that the shot would reach?

Randy Johnson throws a baseball horizontally from the top of a building as fast as his 2004 record of 102.0 mph (45.6 m/s). How much time passes until it moves at an angle 13.0 degrees below the horizontal? Ignore air resistance.

How is the equation of simple harmonic motion y=a sinwt derived and what is the physical meaning of phase

What is the coefficient of kinetic friction if a skier accelerates down a 17 degree incline at a rate of 3.3 m/s^2? draw a diagram with all the forces.

Is it possible to have forces acting on an object, but the object remains at rest? If so, give an example.