Forces and Motion Concepts

Which size ball will require the most force to throw 3 meters?

• size 1

• size 2

• size 3

• size 4

• size 5

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Billy swings at the baseball with greater force than his last swing. What are some reactions you can expect from the ball?

• • The ball will go slower and in the opposite direction it was thrown.

• • The ball will go faster and in the same direction it was thrown.

• • The ball will go faster and in the opposite direction it was thrown.

• • The ball will go slower and in the same direction it was thrown.

Answer explanation

When Billy swings with greater force, he imparts more energy to the ball, causing it to accelerate. The ball will move faster and in the opposite direction of the way it was thrown, as per Newton's third law of motion.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A ball is resting on the ground. Are the forces balanced or unbalanced, and is there motion or no motion?

• Forces are balanced, and there is no motion.

• Forces are unbalanced, and there is motion.

• Forces are balanced, and there is motion.

• Forces are unbalanced, and there is no motion.

Answer explanation

The ball is at rest, meaning the forces acting on it, such as gravity and the normal force from the ground, are equal and opposite, resulting in balanced forces. Therefore, there is no motion.

Tags

NGSS.MS-PS2-2

Which way will the box move and why?

• • The box will move to the left due to the unequal forces.

• • The box will move to the right due to the unequal forces.

• It will not move because the forces are balanced.

• It will move upwards due to an upward force.

Answer explanation

The box will move to the right because the forces acting on it are unequal, resulting in a net force that pushes it in that direction.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

This experiment can be best used to determine...

• how the force used to pull a dictionary affects the mass of a box of marbles

• how volume affects the force needed to move objects

• how the mass of a box of marbles affects the mass of a dictionary

• how mass affects the force needed to move objects

Answer explanation

The correct choice, 'how mass affects the force needed to move objects', directly relates to the experiment's focus on the relationship between mass and force, aligning with Newton's second law of motion.

Tags

NGSS.MS-PS2-2

A push or pull that can cause motion.

• velocity

• speed

• cause

• force

Answer explanation

A push or pull that can cause motion is defined as a 'force'. Unlike velocity and speed, which describe motion, force is the actual interaction that leads to motion.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following statements would explain the event shown in this picture?

• The flag will move to the right because the force are balanced.

• The flag will move to the right because the forces are unbalanced.

• The flag will move to the left because the force are balanced.

• The flag will not move because the forces are balanced.

• The flag will move to the left because the forces are unbalanced.

Tags

NGSS.MS-PS2-2

Which surface has less friction?

• Ice

• grass

• concrete

• pool

Which will most likely increase the speed of an object?

• Applying a slower force

• Applying a faster force

• Applying a weaker force

• Applying a stronger force

Tags

NGSS.HS-PS2-1

Students investigate how mass and force affect the motion of a cart. For trial 1, they use an empty cart. They place the cart on a straight, smooth track. A student applies a brief 1 N force to the resting cart to move it on the track. When the cart crosses the start line, the force is removed and a stopwatch starts timing. The students record that for trial 1 the cart travels 25 centimeters (cm) in 5 seconds. The diagram shows the setup of the investigation. For trial 2, they change the amount of force used to push the cart from 1 N to 2 N.

Part A: Predict the distance traveled by the empty cart in 5 seconds after it crosses the start line for trials 2 and 3.

• 25 cm

• 5 cm

• 50 cm

• 2,000 cm

Tags

NGSS.MS-PS2-2