science
Grade8
Easy
Question
A running athlete slows down from 18 m/s to 6 m/s in 3 minutes when she gets closer to the finish line. Her change in momentum is ___kg.m/s if she weighs 57 kg.
The correct answer is: 684
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Peter owns a remote-control toy car, whose momentum he wants to find out. The speed of the toy car can be controlled using a button. What are the measurements that he needs to make?
a) Weigh the toy car to find its mass
b) Weigh the remote of the toy car to find its mass
c) The distance the car moves using a measuring tape
d) The time taken by the car to move that distance using a stop-watch
Peter owns a remote-control toy car, whose momentum he wants to find out. The speed of the toy car can be controlled using a button. What are the measurements that he needs to make?
a) Weigh the toy car to find its mass
b) Weigh the remote of the toy car to find its mass
c) The distance the car moves using a measuring tape
d) The time taken by the car to move that distance using a stop-watch
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A moving car of mass 1980 kg has a momentum of 49500 kg.m/s. What is its speed?
A moving car of mass 1980 kg has a momentum of 49500 kg.m/s. What is its speed?
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Calculate the momentum of an athlete of mass 64 kg running at a constant velocity of 5 m/s.
Calculate the momentum of an athlete of mass 64 kg running at a constant velocity of 5 m/s.
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How can we increase the momentum of a body?
How can we increase the momentum of a body?
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The momentum of a body of mass m moving at a velocity v is found to be p. What will be its momentum when its mass gets doubled, and its velocity becomes one-third?
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A volley-ball is thrown upwards. How will the momentum of the ball vary when it is moving upwards?
A volley-ball is thrown upwards. How will the momentum of the ball vary when it is moving upwards?
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Three bodies of masses m, 2m, and 3m move at the same velocity. Whose momentum is the highest?
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What is the direction in which the momentum vector points?
What is the direction in which the momentum vector points?
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A bike, a truck, and a car move at the same velocity. Which one of these would have the largest momentum?
A bike, a truck, and a car move at the same velocity. Which one of these would have the largest momentum?
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An arrow, when thrown on a target, does not create much impact. However, when launched from a bow, it can hit the target creating a greater impact. Why?
An arrow, when thrown on a target, does not create much impact. However, when launched from a bow, it can hit the target creating a greater impact. Why?
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A small marble can be used to break a toughened glass door by ___.
A small marble can be used to break a toughened glass door by ___.
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The momentum of a body ___ when its velocity increases.
The momentum of a body ___ when its velocity increases.
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What happens when a fast bowler takes a run-up before bowling?
What happens when a fast bowler takes a run-up before bowling?
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What is the mathematical formula to calculate the momentum of a body of mass m moving at a velocity v?
What is the mathematical formula to calculate the momentum of a body of mass m moving at a velocity v?
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Which one of the following is a scalar quantity?
Which one of the following is a scalar quantity?
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