Forces and Motion

Which of the following graphs demonstrates an object accelerating back to its starting position for a distance v. time graph? (S8P3a)

• Horizontal line

• Diagonal line upwards

• Diagonal line downwards

• Curved line downwards

Tags

NGSS.MS-PS3-1

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. (S8P3b) Which BEST explains the student’s data?

• The cart speeds up as it moves down the ramp.

• The cart maintains a constant speed.

• The cart slows down as it moves down the ramp.

• The cart moves at random speeds.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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

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

Tags

NGSS.MS-PS2-2

Two toy cars move in the same direction with velocities that are shown in the graph. Based on the information in the graph, which statement accurately describes the motion of the two cars?

• Car 1 is traveling faster than car 2.

• Car 2 is traveling farther than car 1.

• Car 1 has a constant velocity between 0 and 10 seconds.

• Car 2 is changing direction between 10 and 15 seconds.

Tags

NGSS.MS-PS3-1

Use the diagram below to answer this question. Which statement is supported by the diagram?

• As the mass of an object increases, the force required for it to accelerate decreases

• As the mass of an object decreases, the force required for it to accelerate increases

• Heavier objects require more force than lighter objects to accelerate at the same time

• Heavier objects require less force than lighter objects to accelerate at the same time

Tags

NGSS.MS-PS2-2

Use the diagram to answer this question. Newton’s third law of motion states that every action has an equal opposite reaction. If this is true, why doesn’t the cart just stay in one place instead of moving to the left?

• The figures are stationary, but the figure and cart are being moved by the ground underneath them.

• The force exerted by the red figure is a greater force when compared to the blue figure, which means the red figure will move in the opposite direction.

• The force exerted by the blue figure is greater than the smaller force exerted by the red figure.

• The force exerted by the red figure is equal to that of the blue figure and they all move to the right because of the opposite force created by the red figure.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student ran on a 6-kilometer running trail at JF Gregory Park. The student completed the first half of the trail in 20 minutes, took a 5-minute rest, and then ran the last 25 minutes of their workout at the same pace they ran for the first 20 minutes. Which graph best represents the student’s motion?

• Graph A

• Graph B

A lab group is investigating how Earth’s gravitational acceleration affects the force exerted on toy blocks of different masses. The group claims that the amount of force needed to accelerate a toy block is directly proportional to its inertia. Which explanation presents the BEST argument for whether the group’s claim is true?

• The claim is false because every time the mass of the metal cube is increased, the pointer on the spring scale moves downward.

• The claim is true because every time the mass of the metal cube is doubled, the gravitational force doubles.

• The claim is false because every time the volume of the metal cube is increased, the pointer on the spring scale moves downward.

• The claim is true because every time the volume of the metal cube is quadrupled, the gravitational force doubles.

Tags

NGSS.MS-PS2-2

Students are exploring the relationship between velocity and acceleration. This graph shows the acceleration of a remote-controlled toy car. Based on the graph above, which of the following statements is true?

• Segment BC and segment EF show constant speed.

• Segment OA and segment BC show constant speed.

• Segment AB and segment CD show positive acceleration.

• Segment OA and segment DE show positive acceleration.

The picture below uses points to show the locations of four friends climbing a mountain. If all four friends weigh the same amount, which person feels the least pull of gravity from Earth?

• Allison because she is farthest from the center of the Earth.

• Benjamin because he has a greater mass than Dennis.

• Callie because she is closest to the center of the Earth.

• Dennis because he has more mass than Allison.