6.7B Mastery Bell Ringer

A student pushes a 10 kg box with a force of 25 N to the right. At the same time, another student applies a 10 N force to the left. What is the acceleration of the box? (Use Newton’s Second Law: F = ma)

• 1.5 m/s² to the right

• 2.5 m/s² to the right

• 3.0 m/s² to the right

• 3.5 m/s² to the right

Tags

NGSS.MS-PS2-2

A 50 kg cart is at rest. A force of 60 N is applied forward, while friction applies a 10 N force backward. What will happen to the cart?

• The cart will move forward with a net force of 70 N.

• The cart will remain at rest since the forces are balanced.

• The cart will move forward with a net force of 50 N.

• The cart will move backward due to friction.

Tags

NGSS.MS-PS2-2

Two people are pushing opposite sides of a box. One pushes with 30 N to the right, and the other pushes with 45 N to the left. What is the net force and direction?

• 15 N to the left

• 15 N to the right

• 75 N to the left

• 75 N to the right

Tags

NGSS.MS-PS2-2

A child is pulling a wagon with a force of 40 N at an angle, while friction resists with 15 N. What is the net force in the direction of motion?

• 25 N forward

• 40 N forward

• 55 N forward

• 15 N forward

Tags

NGSS.MS-PS2-2

A book is sitting on a table. The force of gravity is pulling it down with 10 N. What must be the force from the table for the book to remain at rest?

• 5 N upward

• 10 N upward

• 15 N upward

• 20 N upward

Tags

NGSS.MS-PS2-2

A soccer player kicks a ball with 80 N of force. Another player kicks from the opposite direction with 30 N of force. What is the acceleration of a 2 kg ball?

• 25 m/s² forward

• 40 m/s² forward

• 50 m/s² forward

• 110 m/s² forward

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A scientist measures forces acting on an object. Which situation below proves the object is in equilibrium?

• A 20 N force up and a 20 N force down

• A 10 N force left and a 30 N force right

• A 50 N force forward and a 25 N force backward

• A 0 N force applied in any direction

Tags

NGSS.MS-PS2-2

A car is experiencing a net force of 0 N. What can you conclude about its motion?

• The car is at rest.

• The car is moving at a constant speed.

• The car is accelerating.

• Both A and B.

A delivery truck is traveling at a constant velocity. The driver suddenly applies the brakes, causing the truck to decelerate. What can be said about the net force acting on the truck during braking?

• The net force is balanced because the truck was moving before braking.

• The net force is unbalanced, acting opposite to the truck’s motion.

• The net force is zero because the truck is still on the road.

• The net force is increasing the truck’s velocity.

Tags

NGSS.MS-PS2-2

A person in an elevator feels heavier when the elevator suddenly starts moving upward. What explains this sensation?

• The normal force increases as the floor accelerates upward, pushing on the person more than usual.

• Gravity increases when moving upward.

• The normal force and gravity are always equal, so the person is imagining it.

• The person’s mass has increased.

Tags

NGSS.HS-PS2-1