Forces and Motion

Friction can be described as a:

• non-contact force

• contact force

• slowing of motion

• rough surface

Tags

NGSS.MS-PS2-5

What measurements are needed to calculate the speed of an object?

• grams and force
• force and acceleration
• mass, time. and force
• time and distance

Choose the BEST example of balanced forces.

• a car speeding up
• a leaf blowing in the wind
• a car moving at a constant speed
• a tennis ball bouncing back and forth between players.

Choose the BEST answer that describes how the mass of an object affects its motion.

• The greater the mass of an object, the slower the motion of the object.
• The greater the mass of an object, the faster the motion of the object.
• The greater the mass of an object, the greater the force to move the object.
• The greater the mass of an object, the greater the distance the object will travel.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Melissa and Gabe were testing the flight of leaves as they tossed them in the air.  The leaves would go up and then came to a rest on the ground.  What force made the leaves land on the ground?

• gravity
• friction
• air pressure
• mass

Tags

NGSS.MS-PS2-4

Choose the correct tools for Melissa and Gabe to measure the speed of their leaves.

• measuring tape, balance, stopwatch
• spring scale, measuring tape
• measuring tape, stopwatch
• stopwatch, balance, spring scale

Tags

NGSS.MS-PS3-1

Choose the BEST description of the force of motion of the jumping frog.

• unbalanced forces
• balanced forces
• the force of gravity
• the force of friction

Tags

NGSS.MS-PS2-2

The 5th graders were playing a game of tug-of-war.  The class was divided equally with half the class on one side of the rope and the other half on the opposite side.  For 5 minutes the students pulled and pulled but neither side could pull the flag to one side or the other.  Choose the description of the forces during the 5th grade tug-of-war.

• The forces were unbalanced in the game.
• The forces were friction, gravity, and chemical energy.
• The students all had the same amount of strength.
• The forces were balanced in the game.

What happens when 2 equal forces act on an object in opposing directions?

• no movement; won't move
• Object will move in the direction of the force
• Object will move in the opposite direction of the force
• the object flies

How is motion affected when forces are unbalanced acting on an object?

• Change the speed, change direction, & cause and object at rest to move or change positions
• change speed
• change directions
• object at rest will move or change positions.

Tags

NGSS.MS-PS2-2