Force & Motion

What is the net force?

• 2N to the right
• 2N to the left
• 8N 
• 8N to the right

Tags

NGSS.MS-PS2-2

Which of the following shows that balanced forces are acting on it?

• a rock rolling down a hill
• a person riding a bike
• a cup sitting on a saucer
• a fish swimming in the water

Which of these is an example of speed?

• a bird flies south for the winter
• a car traveled 55mph from Dallas to Arlington
• an acorn fell from a tree and rolled 5 meters north
• i ran 5mi/hour in the race

Tags

NGSS.MS-PS3-1

what distinguishes speed from velocity?

• speed requires distance, time, and mass
• speed requires direction, time and distance
• velocity requires distance, speed, and direction
• velocity only needs time and distance

All of the following describe acceleration EXCEPT...

• the ball changed direction when it hit the side of the table
• the ball traveled at 30 cm/sec while it was moving
• the ball was at rest until the pool cue struck it
• the ball eventually came to a stop because of friction

If the friction were increased to 25N, how will the movement of the bike be affected?

• The bike would move faster
• The bike would move slower
• The bike would stop
• The bike would turn

Tags

NGSS.MS-PS2-2

If a soccer ball is sitting motionless on the grass and then a player kicks it to the right, what would best describe the motion of the ball?

• It would move at a constant speed to the right
• It would move right at an accelerated speed
• It would move right and then left
• It would move the direction it was kicked at a constant speed

Two trucks with different masses are going down a hill.  What would happen if they both applied their brakes to stop at the same time?

• The truck with the smaller mass will require less force to stop than the truck with the larger mass
• The truck with the larger mass will maintain its velocity while traveling down the hill.
• The truck with the smaller mass will take longer to stop than the truck with the larger mass
• The truck with the larger mass will have less inertia than the truck with the smaller mass.

Tags

NGSS.MS-PS2-2

Given the forces being applied, the ball will...

• accelerate to the left
• accelerate to the right
• move at a constant rate to the left
• move at a constant rate to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Describe the energy transformation of a flashlight

• electrical to mechanical to light
• chemical to mechanical to electromagnetic
• kinetic to potential
• thermal to mechanical to light