Ask a New Question
Menu

Which choice represents velocity? (1 point)

A. 35 m/s
B. 15 km/hr west
C. 12 m/s2
D. 4 g/mL

9 answers

The correct choice that represents velocity is:

B. 15 km/hr west

Velocity is a vector quantity that includes both speed (how fast something is moving) and direction. In this case, "15 km/hr west" provides both the speed (15 km/hr) and the direction (west).

A plane is flying at a speed of 70 kilometers per hour. Then a tailwind (moving in the same direction as the plane) of 5 kilometers per hour acts on the plane. How is the plane's net force calculated? (1 point)

• Multiply the two forces
• Add the two forces together
• Divide the larger force by the smaller force
• Subtract the smaller force from the greater one

To calculate the plane's net force when a tailwind acts on it, you would:

• Add the two forces together.

In this case, the speed of the plane (70 km/h) and the speed of the tailwind (5 km/h) are combined to find the total speed of the plane as it moves with the wind.

Two kids play a game of tug-of-war, but the flag in the middle of the rope is NOT moving. What force is being applied to the rope? (1 point)
• One kid applies force and the other does not.
• A kid applies more force in one direction.
• The kids apply equal force in opposing directions.
• The kids apply equal forces in similar directions.

The correct answer is:

• The kids apply equal force in opposing directions.

In a tug-of-war scenario where the flag in the middle of the rope is not moving, it indicates that the forces applied by both kids are equal in magnitude but opposite in direction, resulting in a net force of zero.

A student is moving furniture. Even though table A and table B are the same size, table A requires more force to move. Why? (1 point)
• Table A has a greater mass than table B.
• Table A has greater volume compared to table B.
• Table A has less density than table B
• Table A has less weight than table B.

The correct answer is:

• Table A has a greater mass than table B.

The amount of force required to move an object is related to its mass due to the effect of gravity. If Table A has a greater mass, it will also have a greater weight, requiring more force to overcome inertia and initiate movement.

Newton's First Law says that an object at rest will remain at rest, and an object in motion will remain in motion unless it is acted on by an outside force. This is the law of_
• (1 point)
• momentum
• velocity
• gravity
• inertia

The correct answer is:

• inertia

Newton's First Law is often referred to as the law of inertia, which describes an object's tendency to resist changes in its state of motion.