Big idea 12 &13 Forces and Motion

Jayden’s dresser has twice the mass of his desk. He uses the same amount of force to push them both. What was most likely the outcome?

•  

  Neither the dresser or his desk moved.

• The dresser moved faster than the desk.

• The desk moved faster than the dresser.

• The dresser and the desk moved at the same speed.

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Tyrell was kicking his soccer ball at recess. He noticed that when he kicked the ball with the same amount of force, it rolled farther on the P.E. court than it did when it rolled across the grass. What force is most likely responsible for this difference?

• air resistance

• friction

• gravity

• magnetism

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What always changes when an object is in motion?

• direction

• speed

• position

• mass

A volleyball has less mass than a basketball. If an athlete throws a volleyball with the same force that she throws a basketball, how can you describe the motion of the volleyball?

 

• The volleyball will move slower and not as far.

• The volleyball will move slower and move farther.

• The volleyball will move faster, but not as far.

•   The volleyball will move faster and farther.

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Which of the following objects will have the greatest change in motion?

• A small force is applied to an object with a large mass

• A small force is applied to an object with a small mass

• A large force is applied to an object with a large mass

• A large force is applied to an object with a small mass

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What must be measured to figure out the speed of a moving object?

• the time it took to travel

• the distance it traveled

• the time it took to travel and the distance it traveled

• the direction it traveled and the distance it traveled

When launching a ball with a sling shot, the ball with the ​ ​ (a)   mass accelerates the fastest. Therefore, it travels the ​ (b)   .​

• farthest
• shortest
• least
• greastest

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​ (a)   is a force that opposes motion.

• Friction
• Gravity

For which of these surfaces will friction be greatest when a block of wood slides across it?

• wet ice

• thick carpet

• glass mirror

• waxed wood

Two race cars with the same mass started moving on a race track at the same time. One car reached the finish line of the track in 15 sec, and the other reached the finish line in 20 sec. Why did the cars take different amounts of time to reach the finish line?

• the force of gravity slowed one car, but not the other

• the slower car did not experience any force, so it moved more slowly

• the forces on one car were balanced and on the other car unbalanced

• the engine on the fastest care exerted more force than the engine on the other car

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