Unit 1: Dynamics

Holly Wilson8430
Quiz by Holly Wilson8430, updated more than 1 year ago
Holly Wilson8430
Created by Holly Wilson8430 over 5 years ago
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Description

Questions from my Grade 12 dynamics unit test. Contains: Tension, inclined planes, projectiles, pulley systems, gravitation and more.

Resource summary

Question 1

Question
A ball is thrown into the air with an initial velocity that has a horizontal component of 4.0 m/s [right] and a vertical component of 3.0 m/s [up]. What is the speed of the ball at the top of its trajectory (ignore air resistance).
Answer
  • 0
  • 3.0 m/s
  • 4.0 m/s
  • 5.0 m/s
  • 9.8 m/s

Question 2

Question
The magnitude of the acceleration of the same ball is:
Answer
  • 0
  • 3.0 m/s
  • 4.0 m/s
  • 5.0 m/s
  • 9.8 m/s

Question 3

Question
The horizontal acceleration of the ball is 0.
Answer
  • True
  • False

Question 4

Question
Box A is released from the top of a frictionless ramp inclined at 30 degrees (I couldn't find the symbol) to the horizontal at the same time that Box B is dropped from the same height into free fall. Which reaches the ground first.
Answer
  • Yes
  • Same time
  • Box A
  • Box B

Question 5

Question
The normal force of a box on an inclined plane is [blank_start]perpendicular to the surface[blank_end] and equal in magnitude to [blank_start]mgcosθ[blank_end].
Answer
  • perpendicular to the surface
  • parallel to the surface
  • equal in magnitude to the weight
  • up
  • mgcosθ
  • mgsinθ
  • mgtanθ
  • the weight of the box
  • gravity

Question 6

Question
A car of mass M collides with a truck of mass 3M. The force exerted by the car on the truck must be [blank_start]equal to[blank_end] the force exerted by the truck on the car.
Answer
  • equal to, equal, same as

Question 7

Question
A person of mass M is in an elevator that has an acceleration of A [up]. The apparent weight of that person is M(A+g).
Answer
  • True
  • False
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