Answer:
10. B
13. It's actually 30 seconds but 20 comes closest so B
14. B, any type of stretching is good before you perform any type of physical activity because it loosens up the muscles
15. D, all of the above
Explanation:
I have done many sports in my life and am still very active, I grew to know most of these things through the years.
Answer:
See the explanation below.
Explanation:
in a <u>motion (or constant speed)</u> unless acted on by an external <u>unbalanced </u>force.
This explanation corresponds to newton's second law which tells us that the sum of the forces acting on a body is equal to the product of mass by acceleration, if the object moves with constant speed it is because on this act forces that do not decrease to increase its speed.
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Answer:
Angular displacement of the wheel,
Explanation:
It is given that,
Angular acceleration of the wheel,
Final speed of the wheel,
Time taken, t = 4.5 s
Initially, it is required to find the initial angular velocity of the wheel. Using the first equation of rotational kinematics as :
is the initial speed of the wheel
Let is the angular displacement of each wheel during this time. Using the second equation of motion as :
So, the angular displacement of each wheel during this time is 267 radian.