Ms. Jones DOL 4/3/24

For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table below. Which of these best explains the student’s data?

• The speed of the cart decreases as the cart rolls down the ramp because of the friction between the cart and the ramp.

• The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity.

• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

• The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

Students in an 8th Grade Science class completed a marble drop experiment in their Science class. A model of their experiment is shown below. During which part or parts of the marble’s fall did the marble experience unbalanced forces?

• Part 1 only

• Parts 1 and 2 only

• Part 3 only

• Parts 2 and 3 only

A student uses a magnet to move a 0.024 kg metal ball. The magnet exerts a force of 6 N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?

• 0.024 m/s²

• 0.004 m/s²

• 0.144 m/s²

• 250 m/s²

Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6 m/s²?

• 7 N

• 9 N

• 13 N

• 12 N

When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s². If one of the astronauts had a mass of 60.0 kg, what net force in newtons did the astronaut experience? Write your answer in the box provided below.