Unit 5 Force, Motion, & Energy

The forces of two teams in a tug-of-war are shown in the image below. What is the net force on the rope?

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(a)  

Tags

NGSS.MS-PS2-2

A car travels 150 kilometers in 3 hours. What is the speed of the car?

• 45 km/h

• 50 km/h

• 55 km/h

• 60 km/h

Select all of the homogeneous mixtures.

• Aluminum Foil

• Chunky Tomato Soup

• Milk

• Ketchup

• Chicken Soup

A student must determine the speed of the ball below. It takes 3 seconds for the ball to travel from Point A to Point B. What is the speed of the ball?

• 9 cm/s

• 7.5 cm/s

• 27 cm/s

• 3 cm/s

Tags

NGSS.MS-PS3-1

Which of the following is an example of heat energy by conduction?

• A. a whole metal spoon getting hot when one end is in hot soup

• B. the inside of a car in the sun getting very hot

• C. a fireplace fire heating a room on a cold day

• D. a tar road getting hotter in the sun than a concrete sidewalk

A cheetah runs 200 meters in 4 seconds. A cougar runs 300 meters in 6 seconds. Which of the following accurately compares their speeds?

• A. The cougar is 100 meters faster than the cheetah.

• B. The cheetah is 102 m/s slower than the cougar.

• C. Their speeds are equal.

• D. The cheetah is 45 m/s faster than the cougar.

Tags

NGSS.MS-PS3-1

A student runs two times around a running path at a local park. Each lap is 3 km. The student completes the first lap in 20 minutes. The student then sits on a bench and rests for 5 minutes before completing the second lap in 25 minutes. Which graph best represents the student's motion?

• 
• 
• 
• 

A cyclist travels 60 kilometers in 2 hours. What is the speed of the cyclist?

• 50 km/h

• 40 km/h

• 20 km/h

• 30 km/h

Tags

NGSS.MS-PS3-1

During a demonstration of Newton's Laws of Motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?

• The coin was at rest until the card was removed, so it tended to remain at the same location. Once the card was done, the unbalanced force of gravity caused the coin to fall.

• Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.

• The card has less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.

• The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The three vehicles shown below are all traveling at a speed of 15 m/s, but only the truck has a changing velocity. The pickup truck has a changing velocity because the pickup truck -

• can accelerate faster than the other two vehicles.

• is traveling in the opposite direction from the other two vehicles.

• is traveling on a curve in the road.

• needs a large amount of force to move.