Aball of 0.1kg is thrown straight up into the air with
the initial speed of 15m/s.

a. what is the momentum of the ball when it reaches its
maximum height?
b. what is the momentum of the ball when it is halfway
to the top of its maximum height?

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

How do you tell if someone actually cares about you? and just say they do?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground. what is his gravitational potential energy above the ground?