Force Quiz (Weight and Friction)

A box has a mass of 13 kg. What is the gravitational Force acting on the mass if the gravitational acceleration is 10 m/s^2?

• 13 kg

• 13 N

• 130 N
• 130 kg

Tags

NGSS.MS-PS2-4

A driver presses on the brakes as they approach a red light. The car slows down before coming to a stop at the light. While the car is slowing down, does the car have balanced forces or unbalanced forces?

• Unbalanced forces
• Inertia acting on the car
• Constant speed
• Balanced forces

Tags

NGSS.MS-PS2-2

A jet cruises as 150 knots at an altitude of 10,000 m. If the jet engines produce 5,000 N of thrust, how much force is applied by the air resistance to maintain a balance of forces?

• 10000 N
• 5000 N
• 7000 N
• 3000 N

Tags

NGSS.MS-PS2-2

An object is pushed from rest to a velocity of 4 m/s. The change in velocity takes 2s and the mass of the object is 5kg. Determine the Net Force to the object.

• 10 N
• 20 N
• 15 N
• 5 N

Tags

NGSS.MS-PS2-2

Student A, with a mass of 50 kg sit, in a rolling chair and is pushed by Student B. Student B pushes with a force of 120 N while the floor provides a kinetic friction force of 20 N. What is the acceleration of the Student A?

• 3 m/s²
• 0.5 m/s²
• 1 m/s²
• 2 m/s²

Tags

NGSS.MS-PS2-2

Student A, with a mass of 50 kg sit, in a rolling chair and is pushed by Student B. Student B pushes with a force of 120 N while the floor provides a kinetic friction force of 20 N. Determine the Coefficient of Friction for Student A while rolling?

• 0.03

• 0.08

• 0.10

• 0.04

Tags

NGSS.MS-PS2-2

Find the Force of friction for a box with a mass of 20 kg and a coefficient of friction is 3.0?

*assume gravitational acceleration is 10 m/s^2

• 400 N
• 300 N
• 500 N
• 600 N

Tags

NGSS.MS-PS2-2

Frictional force depends on ____

• surface area in contact

• roughness of surface

• both a and b

• none of the above

Which of the following best describes frictional force?

• A force that acts perpendicular to the surface of contact.

• A force that opposes the relative motion between two surfaces in contact.

• A force that acts at a distance between two masses.

• A force that acts along the direction of motion.

You apply 100 N of force to a 50 kg box and it begins to accelerate. How would the acceleration change if the mass was tripled?

• The acceleration would increase to twice its original value.
• The acceleration would double.
• The acceleration would decrease to one-third of its original value.
• The acceleration would remain the same.

Answer explanation

Acceleration is best described as a change in the direction or speed of an object, making the correct choice the third option.

Tags

NGSS.MS-PS2-2