Force and Motion Quiz/Assessment

A 22 kg object is subjected to various forces. Which of the following will affect the

object’s acceleration according to Newton’s second law? (Select THREE correct

answers.)

• The net force applied to the object.

• The object’s speed.

• The object’s mass.

• The direction of the net force.

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Jordan pushes a cart with a force of 20 N to the right, and friction provides a force of 15

N to the left.

What is the net force acting on the cart?

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A 10 kg box is pushed with a net force of 20 N. According to Newton’s second law, what

is the acceleration of the box? Use the formula a= F/m

• The acceleration is 0.5 m/s².

• The acceleration is 2 m/s².

• The acceleration is 10 m/s².

• The box will not accelerate since the forces cancel out.

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Layla and Diego are using a slingshot to launch pebbles of different sizes. Layla launches a smaller pebble, while Diego launches a larger pebble. They both pull the slingshot with the same force.

Which statement is true about the pebbles?

• The larger pebble will accelerate faster.

• Both pebbles will have the same acceleration.

• The smaller pebble will accelerate faster.

• Acceleration is not affected by force.

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A force of 600 N is applied to a 300 kg object, and it accelerates. What would happen to

the object’s acceleration if the force is doubled while the mass remains the same?

• The object’s acceleration would stay the same.

• The object’s acceleration would double.

• The object’s acceleration would be cut in half.

• The object’s acceleration would quadruple.

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A 5 kg object experiences a net force of 25 N. If the mass of the object were increased

to 10 kg while keeping the net force constant.

Calculate the new acceleration. (Use the calculator on your desk)

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Based on the data table below, what conclusions can you draw about how mass and force affect acceleration? (Select THREE correct answers.)

• When the mass increases, acceleration decreases if the net force stays constant.

• When the net force increases, acceleration decreases if the mass stays constant.

• Acceleration remains the same if both mass and force increase proportionally.

• If net force decreases and mass is constant, the acceleration decreases.

• When the net force decreases, acceleration increases if the mass stays constant.

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A space agency is testing a new rocket design. The table shows the mass of the rocket

and the force applied by its engines during different stages of the launch.

At which stage does the rocket experience the greatest acceleration, and how does this

illustrate the interaction of Newton's laws?

• Initial Lift-off, as the greatest force is applied, demonstrating Newton's second

  law of motion.

• Mid-flight, as there's a balance between mass reduction and force, illustrating all

  three of Newton's laws working together.

• Final Stage, as the rocket has the least mass and still significant force from the

  engine, resulting in the greatest acceleration according to Newton's second law.

• The acceleration is the same in all stages because the force decreases

  proportionally to the mass, as per Newton's first law of motion.

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A sled with a mass of 50 kg is pushed with a force of 100 N.

What will the acceleration of the sled be? (a= F/m)

• 0.5 m/s²

• 1 m/s²

• 2 m/s²

• 3 m/s²

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Which statements are true according to Newton’s Second Law? Select all

that apply.

• Acceleration is inversely proportional to mass.

• Acceleration is directly proportional to mass.

• Acceleration is directly proportional to force.

• Acceleration is inversely proportional to force.