SPH3U
(2015-04-02)
K/U
APP
INQ
COMM
18
L
12
L
Name: _______________________
Parent’s Signature: _______________________
Test #2: Dynamics
Communication reasoning, in writing and use of mathematical language, symbols and conventions will be
assessed throughout this test.
KNOWLEDGE & UNDERSTANDING
Multiple Choice: Circle the correct answer.
1. An object has a mass of 15kg. If it experiences an acceleration of 3 m/s2 [L] the net force is
a) 45 N [L]
b) 5 N [L]
c) 45 N [R]
d) 5 N [R]
2. Which diagram below illustrates an object with a constant velocity to the left?
a)
b)
c)
d)
3. The mass of Planet A is 0.5 times that of Planet B and has a radius that is 3 of Planet B. The gravitational
force of attraction on Planet A is a what factor of Planet B’s
a) 1.5
b) 18
c) 1/6
d) 1/18
Use the following information for questions 6-8:
Consider the frictionless system below being pulled by an external force. Box B is pulled to the right with a
force of 20N. The system has masses of mA = 4kg and mB = 11 kg.
4. What is the acceleration of the system?
a) 1.82 m/s2
c) 1.33 m/s2
b) 5.0 m/s2
d) 20 m/s2
5. What is the force of tension in the string connecting the two boxes?
a) 5.32 N
b) 20N
c) 14.63 N
d) 10 N
SPH3U: Physics (Grade 11 University Prep)
Test #2: Dynamics
Short Answer
v
v
v
1. Three forces are acting on a 10 kg object: F1 = 15 N [ E ] , F2 = 12 N [ N 250 W ] and F3 = 30 N [ S ] .
Determine
a) The net force acting on the object. [4 marks]
b) The acceleration of the object. [1 mark]
2. What is the gravitational force of attraction between two objects with m1 = 1000 kg and m2 = 700 kg if they
are 50 km apart? [3 marks]
SPH3U: Physics (Grade 11 University Prep)
Test #2: Dynamics
INQUIRY
3. As part of a physics lesson, Mr. Culbert shoves a filing cabinet with a force of 30 N. However, he did not
realize the cabinet was empty and it accelerated forwards at a rate of 3.00 m/s2. If µk = 0.3 between the
floor and the cabinet, what is the mass of the filing cabinet?
[6 marks]
4. Mr. Culbert and Mr. Costella are fighting over a 0.5kg toy car. If Mr. Culbert exerts a force of 20 N [L] and
Mr. Costella exerts a force of 32N [R], and the coefficient of kinetic friction between the car and the ground
is 0.15, what is the acceleration of the car? [6 marks]
SPH3U: Physics (Grade 11 University Prep)
Test #2: Dynamics
APPLICATION
5. Explain using Newton’s Laws why there is a difference between stepping off a boat which is tied to a dock,
and one which is not tied to a dock. Include diagrams if necessary. [LEVEL]