Forces, Motion, & Energy

A motorcycle traveling 35 mi/hr slows as it approaches a stop sign. This is an example of

• acceleration
• distance
• speed
• velocity

In the picture above, two teams of students are playing tug-of-war. Each team is pulling in the opposite direction, but both teams are moving in the same direction. Which of the following best describes the forces in this situation?

• The forces are balanced and the net force is zero.
• The forces are balanced and Team A is exerting a greater force.
• The forces are unbalanced and Team A’s force is greater.
• The forces are unbalanced and Team B’s force is greater.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A bike racer travels 17 mi/hr in a southerly direction. This is an example of —

• distance
• speed
• velocity
• acceleration

When the air is released from a balloon, the air moves out one end and the balloon moves in the other direction. Which statement does this situation best illustrate?

• What goes up must come down.
• For every action there is an equal and opposite reaction.
• The shape and size of an object affect air resistance.
• The acceleration due to Earth’s gravity is 9.8 m/s2.

Tags

NGSS.MS-PS2-1

The graph most likely applies to which activity?

• A basketball bouncing up and down on the ground
• A football at rest, then kicked toward the goalpost
• A car traveling at a constant speed, then stopping as brakes are applied
• A person riding a bicycle in a straight line down a level road at a constant speed

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A toy train engine rests motionless on a track. One student begins pushing the engine to the right with a force of 2 newtons. At the same time, another student begins pushing the engine to the left with a force of 5 newtons. Which of the following best describes the resulting motion of the engine?

• It travels left at a constant speed.
• It travels left at an increasing speed.
• t travels right at a constant speed.
• It travels right at an increasing speed.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Based on the observations, the runners do not accelerate during —

• Segment A
• Segments A and C
• Segments B and C
• Segments C and D

The car shown above uses three different forms of energy. Which of the following identifies the energy transformation represented by the car?

• mechanical →chemical →electrical
• chemical →electrical →mechanical
• electrical →radiant →chemical
• radiant →electrical →mechanical

Tags

NGSS.HS-PS3-3

At which point on the roller coaster does the car have the most kinetic energy?

• W
• X
• Y
• Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Javelinas need strong leg muscles to help provide enough force for them to accelerate to high speeds. This fast movement can help Javelinas escape from predators and reach the safety of the pack. If a javelina runs 42 meters in 6 seconds, what is its average speed?

• 6 m/s
• 7 m/s
• 48 m/s
• 252 m/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1