Newton's laws

Which of the following situations describes inertia?

• A stationary object tends to resist being moved.

• A moving object tends to resist a change in speed

• A moving object tends to resist a change in direction

• all of the above

Which of the following is true of inertia?

• It is described in Newton’s first law of motion.

• It is a property of motion

• It is measured by weight.

• all of the above

Which of the following statements describe an object in equilibrium?

I. The object is at rest.

II. The object is moving at a constant velocity.

III. The net external force on the object is zero.

• I and II

• I and III

• II and III

• I, II, and III

The change in the horizontal velocity of a 12-kg scooter is +0.5 m/s. What is the net horizontal force acting on it?

• +24 N

• +6.0 N

• greater than 0 N

• 0 N

In which situation is the net force acting on a car zero?

• The car increases speed and changes direction

• The car increases speed but does not change direction

• The car maintains its speed but changes direction.

• The car maintains both its speed and direction.

In an action-reaction pair, the

• action force is exerted first.

• action force and the reaction force are equal in magnitude and act in the same direction.

• action force and the reaction force are contact forces only.

• action force and the reaction force act on two different objects.

which of the following refer to 2nd law of Newton

• F = ma

• balanced

• acceleration

• changing direction

which of the following refer to the first law of Newton

• balanced

• F = ma

• unbalanced

• inertia