Download Q1. Newton`s second law indicates that when a net force acts on an

Q1. Newton’s second law indicates that when a net force acts on an object, it must accelerate. Does it mean
that when two or more forces are applied to an object simultaneously, it must accelerate? Explain.
Q2. The net external force acting on an object is zero. Is it possible for the object to be traveling with a
velocity that is not zero? If your answer is yes, state whether any conditions must be placed on the magnitude
and direction of the velocity. If your answer is no, provide a reason for your answer.
Q3. All of the following, except one, cause the acceleration of an object to be reduced by a factor of two.
Which one is it?
(a) The net force acting on an object is reduced by a factor of two.
(b) The net force acting on the object is doubled.
(c) All forces acting on the object are reduced by a factor of two.
(d) The mass of the object is doubled.
Q4. When the net force that acts on a hockey puck is 10 N, the puck accelerates at a rate of 50 m/s2. What is
the mass of the puck? Show your work.
(a) 0.2 kg
(b) 1.0 kg
(c) 5.0 kg
(d) 10 kg
(e) 50 kg
Q5. A car has a mass of 1500 kg. It is stuck in the snow and is being pulled out by a cable that applies a
force of 7660 N due north. The resistance of the snow and mud also applies a force to the car, which has a
magnitude of 7510 N and points due south. What is the acceleration of the car? Show your work.
(a) 15 m/s2 north
(b) 10 m/s2 south
c) 0.15 m/s2 south
d) 0.10 m/s2 north
(e) zero