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Karnataka PUC I Laws of Motion — practice questions — page 4

Explore 129 free Laws of Motion questions in Karnataka PUC I Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Laws of Motion questions and exercises with answers

Showing questions 91–120 of 129.

MomentumRead the answer and worked solution →True or false: inertia and forceRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement the first law licensesRead the answer and worked solution →Flip and pair: name with contributionRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the historical argumentRead the answer and worked solution →A bus brakes hard and the standing passengers lurch forward. The property of matter behind that lurch is:Read the answer and worked solution →A textbook defines that property in two words: resistance to:Read the answer and worked solution →Rolling balls down inclined planes to work out how motion really behaves was the method of:Read the answer and worked solution →The older view that a body needs a constant push just to keep moving is described as:Read the answer and worked solution →A trolley on a level floor is pushed and then released. If no net external force acted, its acceleration would be:Read the answer and worked solution →The same law read backwards says acceleration can be non-zero only when there is a net external:Read the answer and worked solution →A 2 kg trolley moves at 3 m/s. Multiplying its mass by its velocity gives its:Read the answer and worked solution →Because velocity has a direction as well as a size, momentum is a:Read the answer and worked solution →A cricketer catches a fast ball and pulls his hands back as he does so. This lengthens the stopping time, which makes the force needed:Read the answer and worked solution →Stated generally, the greater the rate of change of momentum, the greater is the:Read the answer and worked solution →An engineer records a force in SI units. That unit is the:Read the answer and worked solution →A hammer strikes a nail for a few milliseconds. Force multiplied by that short time duration gives the:Read the answer and worked solution →A very large force acting for a very short time is described as an:Read the answer and worked solution →In the third law, the words action and reaction are said to mean nothing else but:Read the answer and worked solution →Two railway wagons collide and couple together. The standard application of conservation of momentum here is the study of a:Read the answer and worked solution →A book lies still on a table. Balancing its weight is an upward push from the table called the:Read the answer and worked solution →A crate is pushed but does not budge. The surface force that cancels the push is called:Read the answer and worked solution →The friction acting before an object begins to slide is distinguished from the friction acting once it moves. The first is called:Read the answer and worked solution →The constant of proportionality linking maximum static friction to the normal force is the coefficient of:Read the answer and worked solution →Experiments show that the coefficient for a sliding object compares with the one for a stationary object as:Read the answer and worked solution →A ring or sphere rolling without slipping touches the ground at just one point at a time. In principle it suffers:Read the answer and worked solution →

Worked practice questions

Momentum

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Questions
  1. Question
    Momentum equals
    Choices
    1. mass × velocity
    2. mass × acceleration
    3. force × time
    Correct choice
    mass × velocity
  2. Question
    Momentum is written
    Choices
    1. K
    2. p
    3. W
    Correct choice
    p
  3. Question
    Momentum is a
    Choices
    1. scalar
    2. constant
    3. vector
    Correct choice
    vector
  4. Question
    Newton's second law concerns the rate of change of
    Choices
    1. momentum
    2. mass
    3. distance
    Correct choice
    momentum
Momentum is mass times velocity, which makes it a vector. Source: syllabus Physics, Ch 4 Laws of Motion.

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True or false: inertia and force

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Questions
  1. Statement is true
    Yes
    Statement
    Inertia is the tendency to resist a change of motion.
  2. Statement is true
    No
    Statement
    A body needs a continuing force to travel at constant velocity in space.
  3. Statement is true
    Yes
    Statement
    Friction is what makes a push seem necessary on Earth.
  4. Statement is true
    Yes
    Statement
    Zero net force allows constant velocity, not just rest.
  5. Statement is true
    No
    Statement
    The first law only applies to bodies at rest.
The first law reframed. Source: syllabus Physics, Ch 4 Laws of Motion.

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Assertion and reason

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Questions
  1. Reason
    With little friction, there is almost no external force to slow it.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    A puck slides a long way on smooth ice with no push.
  2. Reason
    Both say a body's motion persists unless an external force acts.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Newton's first law is a restatement of Galileo's law of inertia.
  3. Reason
    Friction opposes motion in everyday situations.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    A force is required to maintain uniform motion.
The reason must genuinely explain the assertion. Source: syllabus Physics, Ch 4 Laws of Motion.

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