Physical Science- Force & Motion

Which of the following describes an object's position?

• where the object is relative to a reference point

• the speed of the object in a particular direction

• the line or path along which the object moves

• the change in the object's velocity over time

Which of the following is not needed to determine the velocity of a moving truck?

• its mass

• the distance it travels

• the time it takes to travel that distance

• the direction in which it is traveling

An object accelerates if its

• speed remains constant

• direction changes

• mass remains constant

• motion can be plotted on a graph

Tags

NGSS.MS-PS2-2

As you watch a game of tug- of- war, the team on the left pulls the rope with a force of 10N. The team on the right pulls with 10N of force in the opposite direction. As a result, the rope will

• move toward the team on the left

• move toward the team on the right

• move upward

• not move

Tags

NGSS.MS-PS2-2

Which of the following determines an object's inertia?

• weight

• mass

• volume

• density

As you ride in a car, both you and the car are moving at a constant speed. If the car brakes suddenly, you feel your body pulled forward. Why?

• Your body is in motion, and its inertia keeps it in motion.

• Your body is in motion, but its inertia brings it to rest.

• Your body is in rest, but its in inertia puts it in motion.

• Your body is in rest, and its inertia keeps it at rest.

Tags

NGSS.MS-PS2-2

A dog runs from one end of a field to another (305 meters) in 20 seconds. What is the dog's average speed?

• 15.25m/s

• 0.7m/s

• 6100m/s

• 15.3m/s

In which circumstance will two forces acting on an object be balanced?

• if they are equal in magnitude and in opposite directions

• if they are equal in magnitude and in the same direction

• if they are unequal in magnitude and in opposite directions

• if they are unequal in magnitude and in the same direction

A group of students launch a model rocket into the air. It shoots upward, but then it slows down and falls back to Earth. Which two forces are most responsible for halting the rocket's upward motion?

• electrical force and friction

• tension and gravity

• gravity and friction

• magnetic force and buoyant force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which term describes an object's resistance to change in motion?

• buoyancy

• friction

• tension

• inertia