A football player runs down a field with a speed of 8 m/s. How long will it take him to run 20m?
2 answers:
Answer:
Time taken, t = 2.5 seconds
Explanation:
It is given that,
Speed of the football player, v = 8 m/s
We have to find time taken by the football player to run 20 m. It can be calculated suing the formula of speed of the player i.e.
d = distance
t = time taken
t = 2.5 seconds
Hence, time taken by the football player is 2.5 seconds
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A free-falling object is an object moving under the effect of gravitational forces alone
The correct option to select for the True or False question is False
The reason the above selected option is correct is as follows:
According to Newton's second law of motion, we have;
Force = Mass × Acceleration
The force of gravity is
Where;
m = The mass of the object
∴ The force acting on an object in free fall, = m × g
Therefore the acceleration of an object in free fall is the constant acceleration due to gravity, and it therefore, does not change with time
The correct option for the question, acceleration of a free-falling object in a frictionless environment increases as a function of time is <u>False</u>
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