A 60 kilogram student jumps down from a laboratory counter


Asked by wiki @ in Physics viewed by 534 People


A 60 kilogram student jumps down from a laboratory counter. At the instant he lands on the floor hus speed is 3 meters per second. If the student stops in .2 second what is thw average force of floor on the student

Answered by wiki @



As per Newton's law rate of change in momentum is net force

so we can write it as

F = \frac{dP}{dt}

F = \frac{m(v_f - v_i)}{\Delta t}

now we know that

m = 60 kg

v_f = 3 m/s

v_i = 0

\Delta t= 0.2 s

from above equation

F = \frac{60(3 - 0)}{0.2} = 900 N

so he will experience 900 N force in above case


Answered by layla843 @


A 60 kilogram student jumps down from a laboratory table. At the instant he lands on the floor, his speed is 3 meters per second. If the student stops in 0.2 second, what is the average force of the floor on the student?


Answered by layla843 @


The diagram above shows a standing wave pattern formed on a 9.0 meter long string. What is the wavelength of the wave?

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The diagram above shows a 4-kilogram blocScreen Shot 2022-03-04 at 8.47.46 PM.pngk acted upon by two forces only. What is the acceleration of the block?

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Screen Shot 2022-03-04 at 9.03.36 PM.png

In the figure above, a spaceship (not shown) from point P is traveling along the dashed line towards the planet. The net gravitational force at point P is 4.0 x 1010 N. Assume that any motion of the planet is negligible.

If the spaceship stops halfway between the planet and point P, what happens to the magnitude of the net gravitational force exerted on the spaceship by the planet?





Answered by layla843 @



Student A has a mass of 110 kilograms while student B has a mass of 55 kilograms. Both students run up identical flights of stairs. Student A reaches the top in 4.0 seconds while student B takes 2.0 seconds. Which of the following statements is correct?

Do you know the better answer?

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