1. Newton\'s Second Law states a linear relationship between force and a. veloci

Question

1. Newton's Second Law states a linear relationship between force and

a. velocity

b. [there is no linear relationship in Newton's Second law ]

c. agent of the force

d. acceleration

2. Newton's Second Law states that the direction of acceleration due to forces is determined by

a. largest magnitude force on the object.

b. your coordinate system.

c. the specific types of forces on the object.

d. vector sum of forces on the object.

3. Why was Galileo's Law of Inertia a revolutionary/controversial idea when he proposed it?

a. The Law of Inertia states that an object can experience zero net force despite experiencing two or more individual forces.

b. The Law of Inertia opposed the long-accepted belief that the "natural state" of an object is uniform motion.

c. The concept of acceleration was thought of as witchcraft.

d. The Law of Inertia opposed the long-accepted belief that the "natural state" of an object is rest.

e. the law of inertia states that multiple forces can be combined as vectores.

4. Which of the following forces only exist to cancel or to oppose other forces? Select all that are correct.

a. spring force

b.normal force

c.weight force

d.static force

e.kinetic force

f. drag

5. In the future you will likely study other non-contact forces, but in 221 the only non-contact force is the force of gravity. Which statement is true about the agents that touch your object?

a. each agent that touches your object exerts zero or more forces on it .

b. each agent that touches your object exerts exactly one force on in.

c. each agent that touches your object may exert on or zero force on your object.

d.each agent that touches your object exerts one or more forces on it.

6. Provide an example of a non-inertial reference frame. Explain why it is non-inertial.

7. Your most prized possession is sitting on a 45° sloped roof here in Seattle (not really, I hope; I state this as a hypothetical scenario). In order for your possession to be at rest and stay at rest, what is the minimum number of forces on the object?

a. three: weight and normal force and at least one additional force

b. one: only weight

c. four: weight and normal and at least two additional forces

d. two: weight and normal force

Explanation / Answer

Ans: 1- (d)

Ans: 2- (d)

Ans: 3- (d)

Ans: 4- (a) and (f)

Ans: 5- (b)

Ans: 6- an accelerated car is an example of non inertial frame of reference because in this frame newtons law of motions don't hold .

Ans: 7- (a)

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