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maguilarz2005
13.01.2021 •
Physics
A gold ball has a mass of 45g. In a speed test, a golf ball was driven from rest to a velocity of 90m/s.
a) If the time taken for the golf ball to reach this velocity was 0.0005 seconds. What acceleration was this?
b) What forces was applied to the golf ball?
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Ответ:
1)
Acceleration (a)=change in velocity/ change in time
Velocity (v)=90m/s
Time=0.0005s
a=90/0.0005
The acceleration =180000m/s^2 or 180km/s^2
Force = mass x acceleration
m=40g= 0.04kg
F= 0.04x 180000
F= 7200N or 7.2kN
Explanation:
Ответ:
The answer is
49.5°Step-by-step explanation:
Let the angle be x
Since the triangle is a right angled triangle we can use trigonometric ratios to find the value of x
To find the value of x we use cosine
From the question
the adjacent is 13
the hypotenuse is 20
The angle is
We have the final answer as
49.5°Hope this helps you