Soft ball,kick ball,wiffle ball??
2 answers:
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Answer:
0.114 kg or 114 g
Explanation:
From the diagram attaches,
Taking the moment about the fulcrum,
sum of clockwise moment = sum of anticlockwise moment.
Wd = W'd'
Where W = weight of the mass, W' = weight of the meter rule, d = distance of the mass from the fulcrum, d' = distance of the meter rule.
make W' the subject of the equation
W' = Wd/d'................ Equation 1
Given: W = mg = 0.0515(9.8) = 0.5047 N, d = (39.2-16) = 23.2 cm, d' = (49.7-39.2) = 10.5 cm
Substitute these values into equation 1
W' = 0.5047(23.2)/10.5
W' = 1.115 N.
But,
m' = W'/g
m' = 1.115/9.8
m' = 0.114 kg
m' = 114 g
The average speed of the runner is 8.7m/s.
Therefore, Option C) 8.7m/s is the correct answer.
Given the data in the question;
Distance covered;
Time taken;
Average speed;
Speed is the rate at which an object covers a certain distance. It is expressed as:
Where s is speed, d is distance and t is time taken.
We substitute our given distance into the equation
The average speed of the runner is 8.7m/s
Therefore, Option C) 8.7m/s is the correct answer.
Learn more: brainly.com/question/21503615