Question

1. A soup can rolks down a ramp from a height of 7 m. Find the velocity at the bottom. I = 1/2 m r^2

2. If a communication satellite is going to be placed in orbit around earth at a distance of 8×10^8 m from center, fond the speed it needs to move in order to stay in orbit. The mass of the earth is 6×?10^24 kg. G=6.67×10^-11 N m^2/kg^2.

3. A baseball bat has a length of 1.2 m and a mass of 4.6 kg. What torque will be reto give it an angular acceleration of 2 rad/s2? Use I = 1/3 m I^2 for the moment of inertia

4. Friction will hold a car on the roadway no banking thru a curve with a 71 m radius at 26 m/s. Find the coefficient of friction between the tires and the road

5. A wheel 25.0 cm in radius turning at 120 ram increases its frequency to 660 ram in 9.00 s. Find the constant angular acceleration in rad/s, hint: units

Answer 1