daanishvirani12

What is Tense?

1. A car's velocity as a function of time is given by where = 3.00 m/s and = 0.100.

   (a) Calculate the average acceleration for the given time interval of = 1.00 s to = 5.00 s

   (b) Calculate the instantaneous acceleration for = 0 and = 5.00 s

   (c) Construct and graph for the car's motion between = 0 s and = 5.00 s

2. A hot-air balloonist, rising vertically with a constant velocity of magnitude 5.00 m / s, releases a sandbag at an instant when the balloon is 40.0 m above the ground. After the sandbag is released, it is in free fall.

(a) Compute the position and velocity of the sandbag at 0.250 s and 1.00s after its release.

(b) How many seconds after its release does the bag strike the ground?

(c) With what magnitude of velocity does it strike the ground?

(d) What is the greatest height above the ground that the sandbag reaches?

1. A 7500 kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.25 m/ and feels no appreciable air resistance. When it has reached a height of 525 m, its engines suddenly fail; the only force acting on it is now gravity.

(a) What is the maximum height this rocket will reach above the launch pad?

(b) How much time will elapse after engine failure before the rocket comes crashing down to the launch pad, and how fast will it be moving just before it crashes?