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Questions and Answers
What is the winner of a 400m race required to have the greatest of?
maximum speed
When a tennis ball of mass 0.06kg rebounds at the same speed after hitting a wall, what is the change in momentum of the ball?
0.60kg m s
In the given circuit setup, which graph correctly shows how potential difference V varies with length l?
C l
Which of the options correctly defines electromotive force?
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What is the unit for tension expressed in SI base units?
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Which situation could produce the motion of the ball depicted in the graphs?
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In which direction should the pilot point the plane to fly due east in the presence of a northerly wind?
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Which graph would be obtained by the student when plotting potential difference V on the y-axis against the corresponding current I on the x-axis?
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Calculate the efficiency of the motor lifting a block of mass 0.050kg at a constant velocity of 0.40 m s–1, with a current of 85mA and a potential difference of 3.0V.
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