# midterm - 1 If I accelerate forward from rest at a rate of...

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1. If I accelerate forward from rest at a rate of 4 m/s 2 , how fast will I be going after 6 seconds? A. 0 m/s B. 4 m/s C. 6 m/s D. 24 m/s E. I have no idea! D

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2. If you are traveling at 30 m/s, and are asked to slow to a stop within a 3 second period, what will your acceleration be? A. this is a deceleration, and not an acceleration B. 3 m/s 2 C. 10 m/s 2 D. 30 m/s 2 C
3. If I want to accelerate a 50 kg mass at a rate of 0.4 m/s 2 , how much net force should I apply? A. 50 N B. 30 N C. 20 N D. 10 N E. 4 N C

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4. In applying 20 N of force over a distance of 5 meters, how much work was done? A. 4 J B. 5 J C. 20 J D. 100 J E. no work was done D
5. If 100 J of energy went into kinetic energy of 50 kg of mass, how fast did the mass end up going (reminder: K.E . = ½ mv 2 )? A. 1 m/s B. 2 m/s C. 4 m/s D. 5 m/s E. 10 m/s B

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6. How much power does it take to carry a 20 kg box of books (plus your 60 kg mass) up three flights of stairs (30 m) in one minute? (hint: don’t forget g )? A. 10 Watts B. 40 Watts C. 100 Watts D. 400 Watts E. 24,000 Watts D
1. How much kinetic energy would a large (10 kg) pendulum have at the bottom of its swing if it is released from a point 0.5 meters higher than the bottom of the swing? A. I need to know the velocity to figure this out B. 5 Joules C. 50 Joules D. 500 Joules E. 5000 Joules C

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2. How fast will a pendulum (of any mass) go at the bottom of its swing if released from a point 1.25 m above the bottom of the swing? A. I need to know the mass to answer this B. 1 m/s C. about 3.5 m/s D. 5 m/s E. 25 m/s D
If I drop a 0.1 kg superball from a height of 2 meters, how much energy does it have? A. 0.2 Joules

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midterm - 1 If I accelerate forward from rest at a rate of...

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