Aprojectile is shot at an angle 45 degrees to the horizontalnear the surface of the earth but in the absence of air resistance. when it reaches the highest point of its trajectory, its speed is150 m/s. in a second trial with the same projectile, the initialspeed is the same but the angle is now 37 degree with thehorizontal. at its highest point in this trajectory, the velocityof the projectile would be what?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?