A child on roller skates pushes off against the wall with a force of 40N. How far must the child push themselves away from the wall (starting from rest), so that his final kinetic energy is 275J?

What is a example of a solvent

Calculate the kinetic energy of a 150 g baseball moving at a speed of 39. m/s (87 mph).

What's so great about solar energy systems?

Which statement is true of an object in equilibrium? A. The sum of all the horizontal forces is nonzero. B. The sum of all the vertical forces is nonzero. C. The sum of all forces acting on the object is zero. D.

In which of the following locations can Precambrian-aged rocks be found? Select all that apply. A. Australia B. Grand Canyon, Arizona C. Lake Huron in Ontario, Canada D. Hudson Bay in Quebec, Canada E. Black Canyon, Colorado F.

A worker pushes horizontally on a large crate with force of 298 N and the crate is moved 4.3 m. How much work was done?

What would happen to the volume of a ballon left on a sunny window sill and which gas law pridict this result

An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and the rain is falling vertically downward. Originally, the car is empty and moving with a speed of 4.00 m/s.

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be