Suppose we drop a 0.145-kg baseball and a 7.0-kg bowling ball simultaneously from rest. They both fall for 0.50 s and both reach the same speed of 4.9 m/s just before hitting the ground.

(a) What impulse (magnitude and direction) did each ball receive from the earth during the interval between being released and hitting the ground?

(b) What is the rate at which each ball received momentum as they dropped (assuming the rate is constant)?

(c) Is this rate consistent with equation C2.6 in each case?

What does si stand for,when referring to a system of measurement

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.