14237013
Question 1
Question
A ball is thrown upward with an initial velocity of 20m/s. How long will the ball take to reach its maximum height?
Answer
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19.6 s
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9.8 s
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6.3 s
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2.04 s
Question 2
Question
An airplane lands on a runway with a velocity of 150m/s. How far will it travel until it stops if its rate of deceleration is constant at \(-3m/s^{2}\)?
Answer
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525m
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3,750m
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6,235m
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9,813m
Question 3
Question
A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be
Answer
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19.6 m/s
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-5.4 m/s
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-44.6 m/s
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44.6 m/s
Question 4
Question
A rocket is propelled upward with an acceleration of \(25m/s^{2}\) for 5 s. After that time, the engine is shut off, and the rocket continues to move upward. The maximum height, in meters, that the rocket will reach is
Answer
-
900
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1,000
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1,100
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1,200
Question 5
Question
What is the total change in velocity for the object whose acceleration versus time graph is given below?
Answer
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40 m/s
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-40 m/s
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80 m/s
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-80 m/s
Question 6
Question
An object has an initial velocity of 15 m/s. How long must it accelerate at a constant rate of 3 \(m/s^{2}\) before its average velocity is equal to twice its initial velocity?
Answer
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5 s
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10 s
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15 s
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20 s
Question 7
Question
A projectile is launched at an angle of \(45^{0}\) with a velocity of 250 m/s. If air resistance is neglected, the magnitude of the horizontal velocity of the projectile at the time it reaches maximum altitude is equal to
Answer
-
0 m/s
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175 m/s
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200 m/s
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250 m/s
Question 8
Question
A projectile is launched horizontally with a velocity of 25 m/s from the top of a 75m height. How many seconds will the projectile take to reach the bottom?
Answer
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15.5
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9.75
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6.31
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3.91
Question 9
Question
At a launch angle of \(45^{0}\), the range of a launched projectile is given by
Answer
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\(\frac{v_{i}^2}{g}\)
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\(\frac{2v_{i}^2}{g}\)
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\(\frac{v_{i}^2}{2g}\)
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\(\sqrt{\frac{v_{i}^2}{2g}}\)
Question 10
Question
A projectile is launched at a certain angle. After 4 s, it hits the top of a building 500 m away. The height of the building is 50 m. The projectile was launched at an angle of
Answer
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\(14^{0}\)
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\(21^{0}\)
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\(37^{0}\)
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\(76^{0}\)
Question 11
Question
A mass attached to a string is twirled overhead in a horizontal circle of radius R every 0.3 s. the path is directly 0.5m above the ground. When released, the mass lands 2.6 m away. What was the velocity of the mass when it was released and what was the radius of the circular path?
Answer
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velocity = 0.389 m/s; radius = 8.14 m
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velocity = 8.14 m/s; radius = 0.389 m
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velocity = 7.14 m/s; radius = 2.14 m
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velocity = 2.14 m/s; radius = 7.14 m
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