S8P3 Review

S8P3b ~ Carson and Robert are pushing their kayak across the grass toward a lake. Carson is pushing the kayak forward with a force of 400 N. Robert is pushing the kayak forward with a force of 300 N. The grass is pushing the kayak backward with a force of 600 N. Based on only the forces described, which statement describes the forces on the kayak?

• The forces are balanced, so there is no net force on the kayak.

• The forces are balanced, so there is a net force on the kayak.

• The forces are unbalanced, so there is no net force on the kayak.

• The forces are unbalanced, so there is a net force on the kayak.

Tags

NGSS.MS-PS2-2

S8P3c ~ Some pilots of hot-air balloons are getting ready to launch their balloons. Each pilot lights the flame to heat the air in her balloon. Then, the surrounding air applies a force to each balloon to lift it up. Each hot-air balloon has the same acceleration as it starts to rise. Based on the chart, order the colors from greatest to least to show the size of the force applied to each balloon.

• magenta, coral, turquoise, violet, cyan

• cyan, violet, turquoise, coral, magenta

• coral, cyan, magenta, turquoise, violet

• violet, turquoise, magenta, cyan, coral

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

20. S8P3c ~ Volunteers are moving boxes at the food bank. The boxes are all the same size, but they contain different objects. The boxes have the same acceleration when the volunteers start to lift them. Based on the chart, order the boxes from greatest to least to show the size of the force applied to each box.

• apple, box of crackers, box of pasta, can of soup

• can of soup, box of pasta, box of crackers, apple

• box of pasta, can of soup, box of crackers, apple

• apple, box of crackers, can of soup, box of pasta

Tags

NGSS.MS-PS2-2

S8P3c ~ Identical train engines pull trains on different lines. The number of cars each engine pulls depends on the line. Each train has the same acceleration as it begins to move. Based on the chart, order the trains from least to greatest to show the size of the force applied to each train.

• commuter, holiday, midday, late night, weekend

• weekend, late night, midday, holiday, commuter

• holiday, commuter, weekend, midday, late night

• late night, midday, weekend, commuter, holiday

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

S8P3c ~ Acrobats are being thrown by a catapult during a performance. The catapult applies the same force to each acrobat's feet. Based on the chart, order the acrobats from least to greatest to show the size of the acceleration the acrobats will have as they are being thrown.

• Vince, Mika, Troy, Olivia, David

• Troy, Mika, David, Vince, Olivia

• Olivia, Vince, David, Mika, Troy

• David, Olivia, Troy, Mika, Vince

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How is a space shuttle able to leave Earth's surface?

• The space shuttle's engines create an upward force greater than the downward force of gravity.

• The space shuttle's engines create a downward force greater than the upward force of gravity.

• The space shuttle's engines create an upward force less than the downward force of gravity.

• The space shuttle's engines create a downward force less than the upward force of gravity.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Katrina pushes off a flat sidewalk on her new skateboard. What causes her to move?

• The force of her push overcomes the forces of gravity and friction.

• The force of gravity overcomes the forces of her push and friction.

• The force of friction overcomes the normal force of the skateboard and the force of gravity.

• The normal force of the skateboard overcomes the force of her push and the force of gravity.

Tags

NGSS.MS-PS2-2

The car is moving to the right. Which of the following explanation best describes the motion of the car?

• The speed of the car is increasing to the right because the rightward force is 1000 Newtons.

• The speed of the car is decreasing because the leftward force is greater than the rightward force.

• The car is moving to the left because the leftward force is greater than the rightward force.

• The car is at rest because the upward and downward forces are equal and opposite.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

During which interval is the object speeding up?

• A to B

• B to C

• D to E

• E to F

Tags

NGSS.MS-PS3-1

Tamara exerts a force downward on a chair by sitting on it. Using Newton's 3rd Law, select the statement that best explains why the chair does not move downward.

• The chair exerts an upward force that is greater than the force exerted by Tamara.

• The floor exerts an upward force that is greater than the force exerted by Tamara.

• The chair exerts an upward force that is greater than the downward force exerted by Tamara.

• The floor exerts an upward force on the chair that balances the downward force exerted by Tamara.