The rotational inertia of an object rotating about a fixed axis is 10 kg⋅m2. Its angular velocity ω as a function of time t is given by ω(t) = αt3 − ω0, where α = 2.0 rad/s4 and ω0=4.0 rad/s.

Determine the angular displacement of the object from t=1 s to t=3 s.

True or false: the revolution of the earth creates day and night as it rotates around the sun

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

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?