Skill Set 07.1

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1. 1. A hammer has 12.4 kg m/s of momentum, and is going 8.5 m/s, what is its mass? (1.5 kg)

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2. 2. A rocket exerts 10.3 N of force for 2.23 seconds. What impulse does it impart? (23.0 Ns)

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3. 3. A 17.5 N unbalanced force is exerted on a 67.1 Kg mass for 37.2 seconds. What is the change of velocity of the mass? (9.70 m/s)

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4. 4. A .142 Kg baseball going 41 m/s, strikes a bat, and heads straight back to the outfield at 53 m/s. If the bat exerted a force of 2350 N, for what time was it in contact with the bat? (0.00568 s)

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5. Question

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1. A hammer has 12.4 kg m/s of momentum, and is going 8.5 m/s, what is its mass? (1.5 kg)

2. A rocket exerts 10.3 N of force for 2.23 seconds. What impulse does it impart? (23.0 Ns)

3. A 17.5 N unbalanced force is exerted on a 67.1 Kg mass for 37.2 seconds. What is the change of velocity of the mass? (9.70 m/s)

4. A .142 Kg baseball going 41 m/s, strikes a bat, and heads straight back to the outfield at 53 m/s. If the bat exerted a force of 2350 N, for what time was it in contact with the bat? (0.00568 s)

5. A rocket engine burns fuel at a rate of 53.5 grams per second, and develops a force of 65.2 N. What must be the exhaust velocity? (1000 grams = 1 kg) (1220 m/s)