1. What is the magnitude of the momentum of a 9.2-kg eagle flying with a speed of 89.4 m/s?

2. A constant frictional force of 31 N acts on an 87-kg skier for 23 s on level snow. What is the speed change of the skier?

3. A 0.167-kg baseball thrown at 33.1 m/s is hit in a horizontal line straight at the launcher at 43.7 m/s. If the contact time between the bat and the ball is 5.23x103 s, find the force (assumed constant) between the ball and the bat.

4. A 13-kg hammer strikes a nail at a speed of 8.5 m/s and stops at an interval of time of 7.0 ms. (a) What is the impulse given to the nail? (b) What is the force average acting on the nail? (NOTE: ms = millisecond)

5. A ball of mass 0.802 kg moving east (+x direction) with a speed of 4.32 m/s collides head-on with a 0.330-kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?

6. Two astronauts, one of mass 45 kg and the other of 77 kg, are initially at rest together in outer space. Then they separate. How far apart are they when the lightest astronaut has moved 21 m?

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1 The magnitude of the momentum of the eagle can be calculated using the formula momentum mass x vel... View the full answer