Kinematics Pretest

Description

Knowledge pretest on kinematics for Physics II
DC PC
Quiz by DC PC, updated more than 1 year ago
DC PC
Created by DC PC almost 6 years ago
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Resource summary

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
  • 19.6 s
  • 9.8 s
  • 6.3 s
  • 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
  • 525m
  • 3,750m
  • 6,235m
  • 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
  • 19.6 m/s
  • -5.4 m/s
  • -44.6 m/s
  • 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
  • 1,000
  • 1,100
  • 1,200

Question 5

Question
What is the total change in velocity for the object whose acceleration versus time graph is given below?
Answer
  • 40 m/s
  • -40 m/s
  • 80 m/s
  • -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
  • 5 s
  • 10 s
  • 15 s
  • 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
  • 175 m/s
  • 200 m/s
  • 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
  • 15.5
  • 9.75
  • 6.31
  • 3.91

Question 9

Question
At a launch angle of \(45^{0}\), the range of a launched projectile is given by
Answer
  • \(\frac{v_{i}^2}{g}\)
  • \(\frac{2v_{i}^2}{g}\)
  • \(\frac{v_{i}^2}{2g}\)
  • \(\sqrt{\frac{v_{i}^2}{2g}}\)

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
  • \(14^{0}\)
  • \(21^{0}\)
  • \(37^{0}\)
  • \(76^{0}\)

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
  • velocity = 0.389 m/s; radius = 8.14 m
  • velocity = 8.14 m/s; radius = 0.389 m
  • velocity = 7.14 m/s; radius = 2.14 m
  • velocity = 2.14 m/s; radius = 7.14 m
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