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Forces and Motion Semester 2

Quiz by Chelsey

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27 questions
Show answers
  • Q1
    An experiment was performed on a 2-kg block. Forces of 5, 10 and 15 Newtons respectively were applied to the block for 5 seconds. Describe the difference in acceleration between the three trials.
    The final accelerations will all be the same.
    The final acceleration will increase nine time between the first and third trial.
    The final acceleration will triple between the first and third trial.
    The final acceleration will be cut by 1/3 from the first to third trial.
    60s
  • Q2
    Newton's second law states that F = m x a (Force is mass times acceleration). Which example would have the GREATEST acceleration?
    Question Image
    a 1 kg ball thrown with a 0.5 Newton force
    a 50 kg student launched by a 100 Newton catapult
    a 500 kg car accelerated by 1000 Newtons from the engine
    a 10 kg ball thrown with a 50 Newton force
    60s
  • Q3
    Bill and Tom are both towing wagons. Bill's wagon weighs 10 pounds, and Tom's wagon weighs 20 pounds. Bill is pulling his wagon with twice the force that Tom is. How do the wagon speeds compare?
    Tom's wagon is moving 4 times faster than Bill's.
    Bill's wagon is moving 4 times faster than Tom's.
    Bill's wagon is moving 2 times faster than Tom's.
    Both wagons will be moving at the same speed.
    60s
  • Q4
    The image above shows two opposite forces acting on a rope. What can we say is true if the forces on each side of the rope is doubled to 150 Newtons?
    Question Image
    The forces are not balanced, because one man is standing taller than the other.
    The forces are balanced. But, the forces acting on the rope have increased and the rope’s motion is affected
    It cannot be determined without knowing which man is stronger.
    The forces are balanced. Thus, there is no change in forces acting on the rope and the rope’s motion is not affected.
    60s
  • Q5
    When a moving object is acted on by unbalanced forces, the object will
    move in unpredictable patterns.
    move in the same direction as the stronger force.
    stop moving
    move in the direction opposite the stronger force.
    60s
  • Q6
    Consider the free body diagram. It is a graphic representation of Mike exerting a force on a refrigerator. Four balanced forces are acting on the refrigerator in this case, No matter how hard Mike pushes, he cannot move the refrigerator. Mike asks Bill to help him. Both men push with 2N of force. How much force would both men use?
    Question Image
    The force is most likely doubled, while the mass remains the same.
    Mike is still using the same amount of force he originally used.
    Combined, about twice as much force is exerted on the refrigerator.
    If both men push, they each use about half as much force.
    60s
  • Q7
    Consider a situation where you are playing air hockey with a friend. The table shoots small streams of air upward to keep the puck afloat and to minimize friction. When you barely tap the puck forward, it
    moves backward with an equal and opposite velocity.
    continues to accelerate.
    slows and stops.
    moves with a constant speed until hitting the other end.
    60s
  • Q8
    If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what will happen to the box?
    The box will slide toward Susan.
    The box will not move.
    The box will be perpendicular to both Shane and Susan.
    The box will slide toward Shane.
    60s
  • Q9
    Carole is very tired and makes coffee. Why would Newton say that she must use her hand to pick up the cup?
    The idiom that every action has an equal and opposite reaction applies.
    Acceleration of the object is indirectly proportional to the balanced forces.
    The coffee's inertia accelerates with the force due to the unbalanced forces
    An object at rest will stay in at rest unless acted upon by an external force.
    60s
  • Q10
    Carole is surprised when she makes an emergency stop and the tissue box that had been in the back window of her car hits the back of her seat. How would Newton explain what happened?
    Box mass and inertia accelerate with the force.
    The force of stopping caused it to accelerate.
    Every action has an equal and opposite reaction.
    An object in motion tends to stay in motion.
    60s
  • Q11
    A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why this occurred?
    The train ran out of momentum.
    The natural state of the train is not to be in motion.
    The force of gravity slowed the train until it stopped.
    The opposing force of friction stopped the train.
    60s
  • Q12
    A person jumps forward off the front of a stationary boat floating on a lake. Identify the reaction force in this case, between the person and the boat.
    The water applying a force on the boat keeping it from sinking.
    The boat being pushed down by the air.
    The boat applying a force on the person pushing her forward.
    The boat being pushed down by the air.
    60s
  • Q13
    A boy of mass 60 kg stands on a boat of mass 250 kg. This system is stationary. From the boat, the boy throws a rock of mass 1 kg into the water with a velocity of 10 m/s. What is the magnitude and direction of the boat's motion as a result of this?
    The boat moves in the direction of the rock with a velocity of 31 m/s.
    The boat moves in a direction opposite to the rock with a velocity of 10.1 m/s.
    The boat moves in the direction of the rock with a velocity of 0.02 m/s
    The boat moves in a direction opposite to the rock with a velocity of 0.03 m/s
    60s
  • Q14
    In canoeing, you paddle backward to go forward. Canoeing can be explain by Newton's third law that says
    Question Image
    As the paddle push the water backward, the water pusher the paddler forward with an equal force.
    Once the boat is moving forward, it will naturally continue to move forward.
    The body of water has a larger mass and will exert a larger force on the paddle then the paddle does on the water.
    The water transfers energy to the boat to make it move.
    60s
  • Q15
    This graph describes the motion of a sky diver that jumped from an airplane. The skydiver is MOST LIKELY
    Question Image
    accelerating because of an unbalanced force of gravity.
    on the ground and is not falling anymore.
    slowing down because of an unbalanced force of air resistance
    being influenced by equal amounts of gravity and air resistance.
    60s

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