A student kicks a soccer ball gently, and it rolls slowly. She kicks the same ball much harder, and it rolls quickly. How does the ball's energy of motion after the harder kick compare to after the gentle kick?

Two identical bowling balls roll down a lane toward the pins. One rolls fast and the other rolls slowly. Which ball knocks down more pins, and why?

A soccer ball rolls across a grassy field and slowly comes to a stop. Where did the ball's energy of motion go?

A fast-moving toy car crashes into a toy car that is sitting still, and the still car goes shooting forward. What does this show about the fast car's energy of motion?

As a rolling marble slows down, its energy of motion ___.

A student rolls the same ball down the same ramp into a paper cup, once slowly and once quickly, and measures how far the cup slides. Why is this a fair test?

A gentle breeze barely turns a pinwheel, but a strong gust spins it quickly. What does the fast spinning show about the moving air?

At a bumper car ride, a car moving fast gives a much bigger jolt than a car creeping along. Why does the fast car give the bigger jolt?

A car moving fast needs a longer distance to stop than the same car moving slowly. What does the longer stopping distance tell you about the fast car?

A hand-crank flashlight glows brightly when a student cranks quickly, and only dimly when she cranks slowly. What does this show about the crank's motion?

What does an object's speed tell you?

A skateboarder pushes off gently and rolls slowly across the driveway. Later, she pushes off much harder and rolls quickly across the same driveway. Compared to the slow roll, how does her energy of motion during the fast roll compare?

A golf ball hit with a hard swing rolls into a stack of paper cups and knocks them all over. The same ball hit with a gentle tap only nudges the stack. What does knocking over all the cups show about the hard-hit ball?

Two bikes travel the same distance. Bike A takes 10 seconds and Bike B takes 15 seconds. Which bike is faster?

Runner A runs 100 meters in 20 seconds. Runner B runs 100 meters in 25 seconds. Who has the greater speed?

A student gives a toy sailboat a gentle push across a pond. If she gives it a much harder push the next time, what will most likely happen to the sailboat's energy of motion?

A heavy cart rolling slowly always has more energy of motion than a light cart rolling quickly.

Two balls with the same size and mass are rolling. One is fast and one is slow. Which ball has more energy of motion?

A remote control car zooms quickly across the yard. An identical remote control car creeps slowly across the same yard. Which car has more energy of motion?

A quiet toy car rolls quickly across the table. A different toy car rattles loudly as it rolls slowly across the same table. Which car has more energy of motion?

A skater gliding fast across the ice slams into a soft foam wall and dents it deeply. A skater gliding slowly into the same wall barely dents it. What does the deeper dent show about the fast skater?

A toy truck is rolling down a hallway. If it rolls onto a section of hallway where a fan is blowing in the same direction it is moving, giving it an extra push, what will most likely happen to its energy of motion?

A bright yellow toy car rolls slowly across the floor. A dull gray toy car rolls quickly across the same floor. Which fact tells you which car has more energy of motion?

A cyclist pedaling quickly down a street has more energy of motion than the same cyclist coasting slowly down the same street.

Two identical toy carts are released down the same ramp. Cart X rolls to a stop after sliding a long distance across the floor. Cart Y, released more gently, stops after a much shorter slide. What does the longer slide by Cart X tell you?

A kite is flying on a breezy day. If the wind blows harder, what will most likely happen to the kite's speed and its energy of motion?

A marble that shoves a block only a tiny way was moving faster than a marble that shoves the same block far across the table.

A wound-up toy top spun hard keeps spinning for a long time before it wobbles to a stop. The same top spun gently wobbles to a stop much sooner. What does spinning for a long time tell you about the top after it was spun hard?

A wagon rolling along a sidewalk rolls onto a downhill section and speeds up. As it speeds up, its energy of motion _____.

If a toy car goes down a steeper ramp, what will usually happen to its speed?

Which object is moving fastest?

Which object is moving slowest?

A bright red toy truck must have more energy of motion than a plain gray truck of the same size rolling at the same speed.

A toy hammer swung hard hits a bell and makes a loud, ringing clang. The same hammer swung gently only makes a soft tap. What does the loud clang show about the hard swing?

A heavy, large kickball and a light, small kickball roll across the playground at the same speed. Which ball has more energy of motion?

When a soccer player kicks a ball, the player's foot transfers energy to the ball.

Which change would most likely make a rolling marble have more energy of motion?

If two carts have the same mass, which cart can cause a bigger change in a collision?

A jogger running at a fast pace has more energy of motion than the same jogger walking at a slow pace.

A toy race car is rolling along a track. If a student gives it a gentle tap that slows it down, what happens to its energy of motion?