A biologist is studying growth in space. He wants to simulate Earth's gravitational field, so he positions the plants on a rotating platform in the spaceship. The distance of each plant from the central axis of rotation is r = 0.11 m. What angular speed is required?
A motorist driving a 1100-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.6 s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.
A projectile of mass 2.0 kg approaches a stationary target body at 4.9 m/s. The projectile is deflected through an angle of 59.8° and its speed after the collision is 2.8 m/s. What is the magnitude of the momentum of the target body after the collision?