Force, Mass, Acceleration (Challenge)

A 10 kg crate is pushed with a force of 70 N across a rough floor. The floor creates 25 N of friction. What is the net force acting on the crate, and what is the acceleration?

(a)  

• 45 N, 4.5 m/s²
• 50 N, 5 m/s²

• 25 N, 2.5 m/s²

• 70 N, 7 m/s²

Tags

NGSS.MS-PS2-2

Two students pull a 5 kg wagon in opposite directions. One pulls with 30 N and the other with 22 N. What is the acceleration and direction of the wagon?

(a)  

• 1.6 m/s² toward 30 N
• 2.4 m/s² toward 22 N

• 0.6 m/s² toward 30 N

• 1.6 m/s² toward 22 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A 12 kg object is pushed with a total applied force of 50 N. If friction equals 24 N, what is the object's acceleration?

(a)  

• 2.17 m/s²
• 1.0 m/s²

• 3.0 m/s²

• 1.75 m/s²

Tags

NGSS.MS-PS2-2

An object experiences three forces: 40 N north, 25 N south, and 15 N north. If the object's mass is 10 kg, what is the acceleration and direction?

(a)  

• 1.0 m/s² south
• 1.0 m/s² south

• 3.0 m/s² north

Tags

NGSS.MS-PS2-2

A 2,500 kg rocket lifts off. It must overcome gravity (9.8 m/s²) and 1,500 N of air resistance. To accelerate upward at 4 m/s², how much total thrust force must the engines produce?

(a)  

• 34,500 N

• 36,000 N
• 37,000 N

• 39,500 N

Tags

NGSS.HS-PS2-1

A force of 90 N is applied to a cart and causes it to accelerate at 3 m/s². If the same cart now accelerates at only 2 m/s² due to friction, how much force is being lost?

(a)  

• 15 N

• 30 N
• 60 N

• 90 N

Tags

NGSS.MS-PS2-2

A 20 kg box is pushed forward with 100 N, while someone pushes back with 30 N. Friction adds 10 N of resistance. What is the box’s acceleration?

(a)  

• 3.0 m/s²
• 2.5 m/s²
• 2.0 m/s²

• 1.5 m/s²

Tags

NGSS.MS-PS2-2

A train car with a mass of 3,000 kg accelerates at 1.5 m/s². If 500 kg of cargo is added and the force stays the same, what is the new acceleration?

(a)  

• 1.29 m/s²
• 1.25 m/s²
• 1.5 m/s²

• 1.75 m/s²

Tags

NGSS.MS-PS2-2

An object is pushed with a force of 72 N and accelerates at 4 m/s². If the force is doubled, what will be the new acceleration?

(a)  

• 6 m/s²

• 8 m/s²
• 4 m/s²

• 10 m/s²

Tags

NGSS.MS-PS2-2

A 30 kg cart is pulled with 120 N and accelerates at 4 m/s². On a rougher surface, the same force results in 2.5 m/s². What is the value of the frictional force?

(a)  

• 30 N

• 45 N
• 60 N

• 75 N

Tags

NGSS.MS-PS2-2