On some planet, a ball rolls off a horizontal table of height 1.73 m with a speed 2.45 m/s. If the horizontal range is 1.31 m, calculate the acceleration of gravity, in m/s2.

A ball is projected vertically upward with a velocity of 40m/sec. Three seconds later a second ball is projected vertically upward with a velocity of 30m/sec. At what point above the surface of the earth will they meet.

The trajectory of a rock ejected from the Kilauea volcano, with a velocity of magnitude 2.8 m/s and at angle 9.5 degrees above the horizontal. The rock strikes the side of the volcano at an altitude of 3.7m lower than its starting point. Calculate the magnitude of the rock's velocity (in m/s) at impact. Use g = 9.8 m/s?.

The earth has a radius of 6380 km and turns around once on its axis in 24 hours. (a) What is the centripetal acceleration of an object at the earth's equator? Give your answer in m/s and as a fraction of g. (b) If the centripetal acceleration of at the equator is greater than g, objects would fly off the earth's surface and into space. What would the period of the earth's rotation to start this fly off?

B7

A tennis ball is kicked horizontally off the edge of a 33 m high building and lands a distance of 22 m from the edge of the building. What was the final horizontal velocity of the tennis ball, in m/s? Ignore air resistance.

If the length of the centrifuge arm is 13.0 m, at what speed is the rider moving when she experiences 10 g’s? Express your answer with the appropriate units.

A projectile is fired straight upward from the Earth’s surface with an initial speed of 33.3 m/sec. What is its’ speed after 2.8 secs?

A projectile fired on a certain planet Xi follows a parabolic trajectory as shown in the figure. The position of the ball is shown at 1s intervals until t= 3 s. At t=1 s, the ball's velocity is v= (20î+ 8j) m/s. What is the magnitude of the acceleration due to gravity on planet Xi? y v = (201+ 8j) m/s 2s 1 s 3s Os

A physics student on Planet Exidor throws a ball, it follows the parabolic trajectory as shown below. The ball's position is shown at 1 sec intervals until t=3s.At t=ls, the ball's velocity is v= (2i^ +2j^)m/s.(a). Determine the ball's velocity at t= Os, 2s, 3s. (b). What is the value of g on planet Exidor?(c) .What was the ball's launch angle? (2.06+205) mis 0s