Inv2.Exp1 - College Test

A student is pulling a wagon and records the force vs. time values in the table. Which of the following will also remain constant for the wagon?

• velocity
• displacement
• momentum
• acceleration

Tags

NGSS.HS-PS2-1

A 4-kg bowling ball strikes a 1.5-kg bowling pin, as shown in the image. Which of the following is true about the forces between the ball and the pin?

• A. The pin experiences a greater force than the bowling ball. The bowling ball and the pin will have equal, constant accelerations.
• B. The bowling ball experiences a greater force than the pin. The bowling ball and the pin will have unequal, constant accelerations.
• C. The bowling ball and pin experience an equal force in the same direction. The bowling ball will experience a greater acceleration than the pin because it is more massive.
• D. The bowling ball and pin experience an equal force in opposite directions. The pin will experience a greater acceleration than the bowling ball because it is less massive.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A truck and a sports car are traveling down a mountain road. Both the truck and car apply the same force on the brakes of their vehicles at the same time. When each driver presses the brake pedal, a fluid system uses brake fluid and a brake pad to multiply the driver’s force, causing the brake system to decrease the vehicle’s velocity. The velocities of both vehicles are shown in the table. If both drivers apply the same force on the brakes, and both vehicles have identical brake systems, what causes the velocities to differ as time progresses? Use the data in the table to explain your answer.

• The truck has a lower acceleration because it has greater interia
• The truck has a lower acceleration because it has a lower interia
• The truck has a greater acceleration because it has a lower interia
• The truck has a greater acceleration because it has greater inertia

Tags

NGSS.HS-PS2-1

A student is pushing an empty 5.0-kg cart. The cart has an acceleration of 1.5 m/s2 until three books are placed on the cart. Each book has a mass of 2.0 kg. The student continues to push the cart with the same force. What will the acceleration of the cart be after the three books are added to the cart? Show your calculations.

Tags

NGSS.HS-PS2-1

The image shows a free-body diagram of a student pulling a backpack. Complete the free-body diagram. Which of the following correctly completes the free-body diagram by listing the labels left to right, in order from 1-4?

• FCB; FBC; left-down arrow, right-up arrow
• FBC; FCB; right-up arrow, left-down arrow
• FCB; FBC; right-up arrow, left-down arrow
• FBC; FCB; left-down arrow, right-up arrow

Tags

NGSS.HS-PS2-1

Which of the following is an accurate force-acceleration equation for the free-body diagram shown?

• F1 = ma
• F1 + F2 + F3 = ma
• F2 + F3 − F1 = ma
• F2 + F3 = −F1 + ma

Tags

NGSS.HS-PS2-1

Pairs of students are pushing sleds across ice, as shown in the image. Each pair of students is wearing cleats to avoid slipping on the ice, while the sled does not experience any resistance from the ice.Which of the following correctly orders the student pairs from least acceleration to greatest acceleration? The student pair with the least acceleration will be listed first and the student pair with the greatest acceleration will be listed last.

• student pair A; student pair B; student pair C; student pair D
• student pair D; student pair C; student pair A; student pair B
• student pair B; student pair A; student pair D; student pair C
• student pair B; student pair D; student pair C; student pair A

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Students complete an experiment to determine the mass of a cart. A cart is placed on an airtrack which forms a thin layer of air between the cart and track to reduce any resistance to motion. A constant force then pushes the cart down the track. The data from the student’s experiment, shown in the table, is used to construct a graph to determine the mass of the cart. If you constructed a graph what would the x axis and y axis be?

• The y-axis is the net force and the x-axis is the acceleration
• The y-axis is the acceleration and the x-axis is the net force
• The y-axis is the net force and the x-axis is the mass
• The y-axis is the mass and the x-axis is the acceleration

Tags

NGSS.HS-PS2-1

Students complete an experiment to determine the mass of a cart. A cart is placed on an airtrack which forms a thin layer of air between the cart and track to reduce any resistance to motion. A constant force then pushes the cart down the track. The data from the student’s experiment, shown in the table, is used to construct a graph to determine the mass of the cart. What is the mass? (the slope)

Tags

NGSS.HS-PS2-1

Before the skydiver pulls the parachute, the skydiver is in near free fall and only experiences two forces. Student A claims the drag force is less than the weight until between 7 and 9 seconds, when the two forces are equal. Student B claims the drag force is greater than the weight during the entire free fall, but it increases after 7 seconds when the parachute is pulled. Are either of the students correct? Explain your reasoning.

• Student A is correct because the drag force is less than the weight until 7 and 9 seconds.
• Student B is correct because the drag force is less than the weight until 7 and 9 seconds.
• Both students are correct because the drag force is less than the weight until 7 and 9 seconds.
• Neither student is correct because the drag force is less than the weight until 7 and 9 seconds.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4