The graph above shows the velocity versus time for an object moving in a straight line. At what time after t = 0 does the object again pass through its initial position?
Kinematics Big Review

Quiz
•
Physics
•
11th Grade
•
Medium
Melissa Martinez
Used 8+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
1 s
Between 1 and 2 s
2 s
Between 2 and 3 s
Answer explanation
Area bounded by the curve is the displacement By inspection the negative area between 0 and 1s
will be countered by an equal negative area sometime between 1 and 2s.
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in the water a distance d from the base of the cliff. How far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2v?
d
2d
4d
Answer explanation
The time in the air for a horizontal projectile is dependent on the height and independent of the
initial speed. Since the time in the air is the same at speed v and at speed 2v, the distance (d = vt)
will be twice as much at a speed of 2v
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. How do the speeds of the ball at the three points compare?
vP < vQ < vR
vR < vQ < vP
vQ < vR < vP
vQ< vP = vR
Answer explanation
At the top of its path, the vertical component of the velocity is zero, which makes the speed at the
top a minimum. With symmetry, the projectile has the same speed when at the same height,
whether moving up or down.
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. Which of the following diagrams best shows the direction of the acceleration of the ball at point P?
Answer explanation
g points down in projectile motion. Always.
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The graph above represents position x versus time t for an object being acted on by a constant force. The average speed during the interval between 1 s and 2 s is most nearly
(A) (B) (C) (D)
2 m/s
4 m/s
5 m/s
6 m/s
Answer explanation
Average speed = total distance/total time = (8 m – 2 m)/(1 second)
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
At time t = 0, car X traveling with speed v0 passes car Y which is just starting to move. Both cars then travel on two parallel lanes of the same straight road. The graphs of speed v versus time t for both cars are shown above. Which of the following is true at time t = 20 seconds?
Car Y is behind car X.
Car Y is passing car X.
Car Y is in front of car X.
Car X is accelerating faster than car Y.
Answer explanation
The area under the curve is the displacement. There is more area under the curve for Car X.
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
At time t = 0, car X traveling with speed v0 passes car Y which is just starting to move. Both cars then travel on two parallel lanes of the same straight road. The graphs of speed v versus time t for both cars are shown above. 1. From time t = 0 to time t = 40 seconds, the areas under both curves are equal. Therefore, which of the following is true at time t = 40 seconds?
Car Y is behind car X.
Car Y is passing car X.
Car Y is in front of car X.
Car X is accelerating faster than car Y.
Answer explanation
Area under the curve is the displacement. Car Y is moving faster as they reach the same point.
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