Forces and Motion

Which of the following would increase the motion of a ball after it is kicked?

• a high, grassy surface
• a surface sloped uphill
• a surface sloped downhill
• a flat surface

Tags

NGSS.MS-PS2-2

Three children launched a model rocket.
 Which properties best describe the motion of the rocket?

• length and mass
• shape and weight
• height and distance
• speed and direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A long, round balloon is fastened to the end of a toy rocket. When the balloon is blown up and released, the rocket launches into the air. Which force causes the rocket to launch?

• the mass of the balloon
• the weight of the rocket
• the pull of gravity on the rocket
• the air released from the balloon

Tags

NGSS.MS-PS2-1

What is necessary to determine the speed of an object?

• the mass and volume of the object
• the shape of the object and the distance it moved
• the mass of the object and the time it took to move
• the distance moved by the object and the time it took to move

Tags

NGSS.MS-PS3-1

When Anna tells her father that her bicycle is hard to pedal, he oils the chain. How does this make her bike easier to ride?

• Friction on the bike has increased.
• Friction on the bike has decreased.
• Gravity on the bike has increased.
• Gravity on the bike has decreased.

Tags

NGSS.MS-PS2-2

What can cause a moving object to increase its speed in a forward direction?

• a force pushing on the object from the opposite direction
• a force that continually acts on the object in the direction the object is moving
• an increase in the mass of the object
• a decrease in the mass of the object
  

Tags

NGSS.MS-PS2-2

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

• gravity acting on the wagon
  
• friction acting on the wagon
  
• the mass of the wagon
  
• the mass of the child
  

Tags

NGSS.MS-PS2-2

Which best describes the speed of a ball as it is thrown straight up into the air and comes back down?

• The ball goes up at a constant speed, stops, then comes down at a constant speed.
• The ball goes up at a constant speed, stops, and increases speed as it comes down.
• The ball goes slower and slower as it goes up, stops, and then goes faster and faster as it comes down.
• The ball goes slower and slower as it goes up, stops, and then comes down at a constant speed.

A pencil falls off of a desk. What moves the pencil toward the floor?

• mass
• friction
• gravity
• speed

Tags

NGSS.MS-PS2-4

Four cars are at the starting line of a race.   Which car will require the most force to start moving?

• car with mass of 1200 kilograms
  
• car with mass of 1500 kilograms
• car with mass of 1700 kilograms
• car with mass of 2000 kilograms

Tags

NGSS.MS-PS2-2