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1 year ago

PLEASE HELP ASAPP!!!

Physics

1 answer:

Sati [7]1 year ago

7 0

Answer:

hello

Explanation:

for average speed the total distance is important so.

and you must convert min to hour 15 min is 1/4 or 0.25 hour

$s = \frac{x}{t} = \frac{12}{0.25} = 48 \frac{km}{h}$

for average velocity the straight line distance is important so

$v = \frac{d}{t} = \frac{8}{0.25} = 32 \frac{km}{h}$

hope you understand

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a person was using a spanner to loosen a tight nut.Their mass was 50kg the spanner was 0.5m long i) what is the persons weight?

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Explanation:

The weight of a body is equal to the gravitational force exerted on the body; it is given by the equation

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$g=9.8 m/s^2$ is the acceleration due to gravity on Earth's surface

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The turning force (also called torque) exerted by a force rotating an object is given by

$\tau = Fd sin \theta$

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d is the length of the arm (the distance between the force and the pivotal point)

$\theta$ is the angle between the direction of the force and the arm

For the spanner in this problem,

F = 490 N is the force applied (the weight of the person)

d = 0.5 m is the arm (the length of the spanner)

The maximum torque is obtained when $\theta=90^{\circ}$ , therefore it is:

$\tau=(490)(0.5)(sin 90^{\circ})=245 N\cdot m$

Learn more about weight:

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