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vova2212 [387]
3 years ago
14

A ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to

Physics
1 answer:
erma4kov [3.2K]3 years ago
8 0

Answer:

You need the definition of acceleration (a=Vf-Vi/t) and 1 equation of linear motion (deltaX = Vi×t + 1/2×a×t^2). Since you know a is constant (gravity) and you know your initial Vi to be 40 m/s and your final velocity Vf to be zero (maximum height), then you can use thhe definition of acceleration to find time.

-9.81m/s^2 = (0-40m/s)/t

t = (-40)/(-9.81) s

t = 4.077s

Now that you have time, you should know all but deltaX in the equation of linear motion.

dX = (40m/s)(4.077s) + (1/2)(-9.81m/s^2)(4.077s)^2

dX = (163.099m) — (81.549m)

dX = 81.55m

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Answer : The change in momentum of an object is equal to the impulse that acts on it.

Explanation :

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The formula of change in momentum is,

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J=F\times \Delta t

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\theta = 15^o \: or\: 75^o

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