1.Tom has a mass of 70.0 kg. and Sally has mass of of 50 kg. Tom and sally are are standing 10.0 m apart on the dance floor find the size of the gravitational force.
2. If a torque of of 55.0Nm is requiredto turn a bolt and the largest force you can apply is 135N, how long is the lever?
3. The outer edge of a tire that has a radius of 45 cm has a velocity of 23 m/s. what is the angular velocity of of the tire in rad/s?
4. Two electrons, each with a charge of -1.6x10-19 C,in an atom are separated by 1.5x10-19 m.what is the electrostatic force between them?
5. A 60.0v battery is connected to a lamp, which has a resistance of 12.5Omega .how much current is flowing through the circuit?
6. A110 v electric iron draws a current of 3.0 A. How much power does the iron consume?
7. The driver of a 2175 kg. compact car applies the brakes hard for 2.0s.As a result, an average force of 5.0x 10 N is exerted on the car .What is change in velocity of the car?
8. An 1875 kg. car going 23m/s rear-ends a 1025 kg.compact car going 17 m/s in the same direction.The two cars stick together.how fast the two cars move after the collisiobn?
9. Marble A. mass50.0 g,moves at a speed of of 2 m/s West it collides with a second marble mass 100.0g, moving at 1m/s also West.What is the speed and direction of marble B after the collision?
10. A 150 g bullet is fired from a 4.5 kg. rifle, at rest .when the bullet leaves the barrel of the gun it is traveling at 645 m/s. With what velocity does the gun recoil,move back?