Acylinder is fitted with a piston, beneath which is a spring, as in the drawing. the cylinder is open at the top. friction is absent. the spring constant of the spring is 3900 n/m. the piston has a negligible mass and a radius of 0.020 m.

a) when air beneath the piston is completely pumped out, how much does the atmospheric pressure cause the spring to compress?
b) how much work does the atmospheric pressure do in compressing the spring?

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s