Problem 3.44 An object of mass m in a uniform gravitational field is dropped from some initial height. Assume that the force of air resistance is proportional to the first power of the velocity (x bu). Show that the distance y it has fallen in time t is y = mg b (t + m² (e " − 1)). - -bt/m
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- Computation. A rocket, with a mass of 1.8 x 104 kg, blasts off from earth with a uniform upward acceleration of 2.78 m/s². Ignoring any air resistance, calculate the magnitude of the rocket engines' upward thrust, T T= N 2 Record your numerical answer below, assuming three significant figures.An astronaut wearing a space suit floats in the middle of a room with no air and is 20.0m from any wall, the floor and the ceiling. She needs to get to the door. She has only a book and a pencil in her possession. Under these conditions, how can she get to the door?Question 20, Physics - equation sheet attached
- A 1500 kg car was moving +31 "½ (E) in the exit lane, but 7.0 s later only +10 m/ (E) at the S exit ramp. b) compute the car's displacement (vector!) if its acceleration was constant during that interval O +217 m (E) +70 m (E) O +143.5 m (E) O +290.5 m (W) O +73.5 m (E) O -73.5 m (W)I've been moonwalking for hours, and I'm getting tired. Explain why, as I come to a stop, my velocity is increasing while my speed is decreasing.A 5-kg block is set into motion up an inclined plane (30°) with an initial speed of 8.0 m/s. There is friction between the block and the plane. The block comes to rest after traveling 3.0 m along the plane. Define the positive x-direction to be down the ramp.
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