1. A 8.3 kg chair is pushed across a frictionless floor with a force of 42 N that is applied at an angle of 22° downward from the horizontal.
What is the magnitude of the acceleration of the chair?
2. A 0.50 kg cream pie strikes a circus clown in the face at a speed of 5.00 m/s and stops. What is the change in kinetic energy of the pie?
3. How high above the ground does a 7.00 kg bird possess 7300 J of gravitational potential energy?
4. What is the velocity of a 10 kg puppy that has 1.3 kg·m/s of momentum?
5. A bicycle rider pedals around a circular track at 5.1 m/s. The track's radius is 51 m. What is the period of the bicyclist's motion?
6. A daredevil bike rider speeds around a circular track. The bike and rider together have the mass shown. What is the magnitude of the centripetal force acting on them?
7. What is the gravitational force between planet M and its moon, m?
Enter your answer in scientific notation using e for ×10. For instance, use 2.0e4 for 2.0×104
8. What is the speed of a communications satellite orbiting the Moon at an altitude of 260.0 km above the Moon's surface? The mass of the moon is 7.35×1022 kg and the radius is 1.74×106 m.