PART A: MULTIPLE CHOICE (20 Marks)
The following 6 questions are based on the drawing
1) If M is 10 kg and Fa = 100 N and there is no friction, what will the acceleration of M be? a) 0 m/s
2 b) 10 m/s
2 c) 9.8 m/s
2 d) 1.02 m/s
2
2) Fa = 500 N and
µ k
= .310. The velocity of the block is 20 m/s. What is M? a) 25 kg b) 1519 kg c) 165 kg d) 245 kg
3) If M is to remain at rest, what is the maximum Fa if M = 20 kg and
µ s
= .350? a) 0 N b) 103 N c) 7 N d) 68.6 N
4) The block is already in motion but F f
is greater than Fa, what motion is the block experiencing? a) Speeding Up b) Slowing Down c) Positive Acceleration d) Constant Velocity
5) What is F f
if M = 50 kg and
µ
= 0? a) 0 N b) 50 N c) 490 N d) 9.8 N
6) M is moving at a constant velocity and weighs 980 N. If Fa = 100 N what is
µ
= ? a) 0 b) .102 c) .350 d) .0104

The following 4 questions are based on the drawing
7) If M = 20 kg what is the F t
equal to? a) 196 N b) 20 N c) 0 N d) 98 N
8) If M weighs 196 N what is the force on the ceiling? a) 196 N b) 10 N c) 20 N d) 49 N
9) If M = 20 kg and there were two parallel ropes, what would F t
=? a) 98 N b) 10 N c) 49 N d) 0 N
10) What is the net force in this drawing if M = 20 kg? a) 0 N b) 196 N c) 49 N d) 98 N
PART B: SHORT ANSWER (10 Marks)
1) What is the difference between static friction and kinetic friction?
2) What is the normal force?
3)
Explain Newton’s First Law
4) What affects friction?
5) How would you get off a frozen pond with a frictionless surface?

PART C: LONG ANSWER (10 Marks)
1) Two friends are taking their homework home on a toboggan. One is pushing downwards with a force of 180 N 33° from the horizontal. The other pulls with a force of 210 N upwards at an angle of 38°. What is the acceleration of the homework if the homework and toboggan have a mass of 50 kg and
µ
= .150?
2) What is the acceleration and tension of the following system?
M = 20 kg m = 10 kg
µ
= .150
Calculate the force of tension in the string. (5 MARKS)