A 60 kg student is standing motionless. Approximately how much force is the floor exerting on the student?

A. 60 kg downward

B. 600 N upward

C. 600 N downward

A baseball has a mass of 0.145 kg and is 12 m above the ground. If it has a mechanical energy of 105.8 J, how fast is it moving? 17 m/s 35 m/s 89 m/s 130 m/s

What is friction. what does friction do as an ice skater slide across the ice?

What does the speed of a wave on a string depend upon

When two or more elements chemically combine the result is?

Why isn't the wave nature of light (visible electromagnetic radiation) obvious to us?

What would we need to know to calculate both work and power? energy, force, and time force, distance, and time force, mass, and distance mass, force, and energy

A 1.4 kg particle moves along an x axis, being propelled by a variable force directed along that axis. Its position is given by x = 3.0 m + (4.0 m/s) t + ct2 - (1.6 m/s3) t3, with x in meters and t in seconds. The factor c is a constant. At t = 3.

One reason that life as we know it is unlikely to exist on Venus is because A. the surface temperature is too high. B. the surface temperature is too low. C. the surface has too much ice covering it. D. there is no atmosphere.

An object has a kinetic energy of 275 j and a momentum of magnitude 25.0 kg · m/s. find the (a) speed and (b) mass of the object.

with the wind a driver travels 300 mies in 5 hours. The return trip against the wind take the driver 6 hours. At what rate would thedriver travel without any wind What is the rate of thew ind?