force/motion final

The amount of matter that makes up an object

• Velocity

• Force

• Mass

• Weight

Tags

NGSS.MS-PS1-1

In what ways can an object's velocity change?

• Start moving/Stop Moving

• Speed up/Slow Down

• Change Direction

• All of the above

Tags

NGSS.MS-PS2-2

For an object's velocity to change, you must apply

• More mass to the object

• More velocity to the object

• A force to the object

Tags

NGSS.MS-PS2-2

How does applying a stronger force to the same object change the object's velocity?

• No change

• Stronger force = Greater change in velocity

• Stronger force = Less change in velocity

Tags

NGSS.MS-PS2-2

The same strength force is applied to the following objects. Which object will have the greatest change in velocity?

• Object 1: 0.5 kg

• Object 2: 1 kg

• Object 3: 2 kg

• Object 4: 4 kg

Tags

NGSS.MS-PS2-2

You push a wooden block and it slides across the floor. As it slid it slowly decreased it's velocity and stopped after 5 ft.

Why did the block stop moving?

• The floor applied a force in the opposite direction of the block's motion

• The block ran out of force

• The floor absorbs force from the block

• All objects naturally stop moving because objects want to be at rest

Tags

NGSS.MS-PS2-2

How can you describe the forces between two objects in a collision, no matter their mass? (pun intended)

• Equal strength, opposite directions

• Unequal strength, opposite directions

• Equal strength, same direction

• Unequal strength, same direction

Tags

NGSS.MS-PS2-1

The last question asked about forces in a collision, which are always applied equally between objects.

This means that when a bug hits the windshield of a car on the highway, the bug applies the same force to the car that the car applies to the bug.

Why does the bug experience a bigger change in velocity than the car does?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Crash 1: Cart with Less Mass

Before: Moving 5m/s

After: Moving 8m/s (sped up by 3 m/s)

Crash 2: Cart with more mass

Before: Moving 5m/s

After: Moving 8m/s (sped up by 3m/s)

Which crash experienced a greater force applied by the skateboard?

• Crash 1

• Crash 2

• Both crashes experienced equal forces

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

All three balls have EQUAL MASS and were moving at DIFFERENT VELOCITIES before a force acted on them.

Before:

Purple Ball Speed: 8m/s

White Ball Speed: 10m/s

Green Ball Speed: 16m/s

After:

Purple Ball Speed: 12m/s (sped up 4m/s)

White Ball Speed: 14m/s (sped up by 4m/s)

Green Ball Speed: 10m/s (slowed down by 6m/s)

Which ball experienced the strongest force when hit, and why?

• The white and purple balls becaused they gained force, while the green ball lost force

• The green ball because it takes a stronger force to slow something down than to speed it up

• The green golf ball because it's velocity changed the most

• The white golf ball because it had the highest ending velocity

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2