Relative Motion
Quiz by Becky Helmer
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- Q1
A passenger at the rear of a train traveling at 15 m/s relative to Earth throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train. What is the velocity of the baseball relative to Earth as it leaves the thrower’s hand?
0 m/s
30 m/s
15 m/s
30s - Q2
A ferry is crossing a river. If the ferry is headed due north with a speed of 2.5 m/s relative to the water and the river’s velocity is 3.0 m/s to the north, what will the boat’s velocity relative to Earth be?
2.5 m/s
3 m/s
0.5 m/s
5.5 m/s
30s - Q3
A girl at an airport rolls a ball north on a moving walkway that moves south. If the ball’s speed with respect to the walkway is 0.15 m/s and the walkway moves at a speed of 1.50 m/s, what is the velocity of the ball relative to the ground?
1.35 m/s south
1.65 m/s north
1.65 m/s south
1.35 m/s north
30s - Q4
A boat traveling at 5.0 m/s through the water keeps its bow pointing north along a stream that flows south at 3.0 m/s. What is the resultant velocity of the boat with respect to the shore?
2 m/s north
8 m/s south
8 m/s north
2 m/s south
30s - Q5
A plane leaves Atlanta flying northeast at 100 m/s. Another plane leaves Atlanta flying southwest at 150 m/s. What is their velocity relative to each other?
250 m/s southwest
50 m/s northeast
250 m/s northeast
50 m/s southwest
30s - Q6
A plane leaves Atlanta flying due west at 100 m/s. It encounters a head wind of 15 m/s due east. What is the relative velocity of the plane?
100 m/s
115 m/s
85 m/s
30s - Q7
A plane leaves Atlanta on time flying due west at 100 m/s. It encounters a head wind of 15 m/s due east. Is it most likely to arrive early or late to its destination?
early
late
30s - Q8
A plane leaves Atlanta on time flying due west at 100 m/s. It encounters a tail wind of 15 m/s due west. Is it most likely to arrive early or late to its destination?
late
early
30s - Q9
A plane leaves Atlanta on time flying due west at 100 m/s. It encounters a tail wind of 15 m/s due west. What is the plane's relative velocity?
100 m/s
115 m/s
85 m/s
30s - Q10
A boat traveling at 5.0 m/s through the water keeps its bow pointing north along a stream that flows north at 3.0 m/s. How long will it take the boat to travel 160 meters?
20 seconds
53 seconds
32 seconds
30s