PhS: 2nd Semester Exam

Balanced forces acting on an object cause the object to accelerate.

• True

• False

If an unbalanced force is acting on a rope, the rope will accelerate in the direction of the unbalanced force.

• True

• False

Tags

NGSS.MS-PS2-2

Unbalanced forces can make an object accelerate by ____.

• changing its speed

• changing its direction

• both a and b

• neither a nor b

Tags

NGSS.MS-PS2-2

Which of the following is a force?

• friction

• momentum

• acceleration

• velocity

Which of the following is an example of an unbalanced force?

• car sitting in the garage

• book sitting on a table

• person leaning on a wall

• person on an elevator going down

Tags

NGSS.MS-PS2-2

Which of the following best completes the phrase? For every action there is ____.

• a reaction

• an equal reaction

• an opposite reaction

• an equal and opposite reaction

Tags

NGSS.MS-PS2-1

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the ____ direction to that of the first object.

• opposite
• right angle

• same

• vertical

Tags

NGSS.MS-PS2-1

Forces that are equal in size but opposite in direction are ____.

• balanced forces
• inertial forces

• net forces

• frictional forces

Tags

NGSS.MS-PS2-1

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

• follow a curved path

• go straight up

• fall straight down

• travel horizontally

Tags

NGSS.MS-PS2-4

The force you have to overcome to start an object moving is ____.

• static friction
• rolling friction

• air resistance

• sliding friction

Tags

NGSS.MS-PS2-2