1.) What do force vectors represent in force diagrams?
a.) magnitude
b.) direction
c.) magnitude and direction
d.) none of the above
2.) How is a free-body diagram different than a force diagram?
a.) represents the object
b.) represents the system
c.) diagram of the multiple objects and forces
d.) represents only scalar quantities
3.) A type of force that acts at a distance is
a.) contact force
b.) normal force
c.) field force
d.) frictional force
4.) Which of Newton's laws best explains why motorists should buckle-up?
a.) Newton's first law
b.) Newton's second law
c.) Newton's third law
d.) law of masses
5.) Which of Newton's laws best explains why for every action there is an equal and opposite reaction?
a.) Newton's first law
b.) Newton's second law
c.) Newton's third law
d.) law of masses
6.) Which of Newton's laws best explains why pushing an object will cause it to accelerate?
a.) Newton's first law
b.) Newton's second law
c.) Newton's third law
d.) law of masses
7.) The mass and weight of an object are
a.) the same throughout the universe
b.) changing throughout the universe
c.) mass is constant, weight changes throughout the universe
d.) weight is constant and mass changes throughout the universe
8.) An object has a mass of 80 kg on the Earth. What is the mass of the object on the surface of the Moon where the acceleration due to gravity is only 1/6 of that on the Earth?
a.) 80 kg
b.) 8.15 kg
c.) 480 kg
d.) 8.00 kg
9.) An object sits on a frictionless surface. A 20-N force is applied to the object, and it accelerates at 2.0 m/s^2. What is the mass of the object?
a.) 40.0 kg
b.) 10.0 kg
c.) 20.0 kg
d.) 4.00 kg
10.) An antitank weapon fires a 3.00-kg rocket which acquires a speed of 30.0 m/s after traveling 0.60 m down a launching tube. Assuming the rocket was accelerated uniformly, what is the average force acted on it?
a.) 750 N
b.) 1225 N
c.) 2250 N
d.) 90 N