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3 years ago

Calculate the kinetic energy of a motorcycle of mass 60kg travelling at a velocity of 40km/h

Physics

1 answer:

ELEN [110]3 years ago

5 0

Answer:

1848.15J

Explanation:

KE =1/2 mv^2

Mass = 60kg, velocity =40km/h =11.11m/s

Hence

KE =30 x(11.1)^2 /2 = 1848.15J

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A crowbar with the length of 200 cm is used to lift the load of 600 Newton . If the distance between fulcrum and load is 0.75 .

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Answer:

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b. Mechanical advantage (M.A) = 0.625

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Explanation:

Given the following data;

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100 cm = 1 m

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Cross-multiplying, we have;

X = 0.75 * 100 = 75 cm

First of all, we would find the effort arm;

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Effort arm = 125 cm

Next, we would determine the mechanical advantage (M.A) of the crow bar;

Substituting the values into the formula, we have;

M.A = 0.625

To find the effort of the crow bar;

Making "effort" the subject of formula, we have;

Effort = 960 Newton

Lastly, we would determine the velocity ratio (V.R);

V.R = 1.67

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3 years ago

Calculate the kinetic energy of a motorcycle of mass 60kg travelling at a velocity of 40km/h​

Calculate the kinetic energy of a motorcycle of mass 60kg travelling at a velocity of 40km/h