Force and Motion

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

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

Two identical balls are pushed with the same force. One ball is pushed along a flat surface and the other ball is pushed down a slanted surface. Which ball will travel faster and why?

• the ball on the flat surface, because of increased friction
• the ball on the flat surface, because of decreased gravity
• the ball on the slanted surface, because of increased gravity
• the ball on the slanted surface, because of decreased friction

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Sam is building a car to race down a ramp. The car weighs 100 grams. Which could Sam do to increase the speed of the car?

• increase the mass of the car
• decrease the mass of the car
• increase the friction on the ramp

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Jan has two identical magnets on her metal cabinet. She hangs a drawing using Magnet 1. She tries to hang a calendar using Magnet 2, but the calendar falls to the floor.
Which best explains why Magnet 1 can hold up the drawing but Magnet 2 is unable to hold up the calendar?

• The area near Magnet 1 has extra metal.
• The calendar is longer than the drawing.
• The area under Magnet 2 has more gravity.
• The calendar has a greater mass than the drawing.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-3

A helicopter traveled 200 miles in one hour. During the next hour, it traveled another 200 miles. Which best describes the average speed of the helicopter during the second hour?

• slower than the first hour
• faster than the first hour
• about the same as the first hour
• exactly the same as the first hour

A news truck traveled 60 miles in one hour on Thursday and 240 miles in four hours on Friday. Which best describes the average speed of the truck? (speed = distance ÷ time)

• The truck drove more slowly on Friday.
• The truck drove more slowly on Thursday.
• The truck drove the same speed on both days.

Tags

NGSS.MS-PS3-1

Michelle drove 300 miles in 6 hours. What was Michelle’s speed?
(speed = distance ÷ time)

• 30 miles per hour
• 50 miles per hour
• 60 miles per hour
• 80 miles per hour

Tags

NGSS.MS-PS3-1

Suzy’s trip to the store takes 30 minutes. She stays inside the store for 10 minutes before returning home. She follows the exact same route home, making her total trip time one hour and twenty minutes. Which statement best describes Suzy’s motion?

• She slows down on the return trip.
• She speeds up on the return trip.
• Her speed remains constant.
• Her speed gains momentum.

If 10 grams of water are added to 5 grams of salt, how much salt water will be made?

• 2 grams
• 5 grams
• 10 grams
• 15 grams

A rock weighing 60 g is broken into 2 pieces. What are possible weights for the two pieces of rock?

• 20 g and 20 g
• 30 g and 20 g
• 30 g and 30 g