Earth-Moon-Sun System — Unit test Answers
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A 150 g egg is dropped from 3.0 meters. The egg is moving at 4.4 m/s right before it hits the ground. The egg comes to a stop in 0.072 seconds.
A
0.66 NB
9.2 NC
13 ND
180 N22
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Rahul wants to change the motion map shown so that it shows uniform circular motion.
A
He should change the length of each vector that points toward the center so that it is the same length as the vector pointing tangent to the circle at that point.B
He should change the lengths of the vectors that point tangent to the circle so that each is the same length.C
He should change the direction of the vectors that are tangent to the circle so that each points away from the center of the circle.D
He should change the direction of the vectors that are tangent to the circle so that each points toward the center of the circle.23
A boy is running to the east and jumps into a stationary boat in a lake. Once the boy lands in the boat, the boat moves to the east.
A
The initial momentum of the boy is zero because the velocity cancels with the mass of the boy.B
The initial momentum of the boy is greater than the boy/boat because the boy has a greater velocity than the boat.C
The initial momentum of the boy is less than the boy/boat because the boy has less mass than the boat.D
The initial momentum of the boy is equal to the boy/boat because the final velocity of the boat is less than the initial velocity of the boy.Did you find these answers helpful?
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