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3 years ago

A wagon is pulled to the right using a force of 20 N and to the left using a force of

Physics

1 answer:

hammer [34]3 years ago

6 0

Answer:

Net force = 10N

Explanation:

Net force refers to the sum total of all the forces acting on an object. Net force is denoted by Fnet. According to Newton's third law of motion, for every action force, there is an equal and opposite reaction force. This means that an object with net force is an unbalanced force.

In this case, a wagon is pulled to the right using a force of 20 N and to the left (opposite direction) using a force of 30 N. This means that the net force will be the difference of the two forces acting on the object i.e

Fnet = Fa - Fb

Fnet = 30N - 20N

Fnet = 10N

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A person of 70 kg standing on an un-deformable horizontal surface. She bends her knees and jumps up from rest, achieving a launc

eduard

Answer:

1190 N

Explanation:

Force: This can be defined as the product of mass and velocity. The unit of force is Newton(N).

From the question,

F = ma................. Equation 1

Where F = average force, m = mass, a = acceleration.

But,

a = (v-u)/t................ Equation 2

Where v = final velocity, u = initial velocity, t = time.

Substitute equation 2 into equation 1

F = m(v-u)/t.............. Equation 3

Given: m = 70 kg, v = 1.7 m/s, u = 0 m/s (from rest), t = 0.1 s.

Substitute into equation 3

F = 70(1.7-0)/0.1

F = 1190 N.

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3 years ago

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Kruka [31]

Answer:

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3 years ago

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podryga [215]

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3 years ago

What are two benefits of scientists using a diagram to model the water cycle?

Sidana [21]

Explanation:

it can be used to show how the parts of the cycle relate to one another

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3 years ago

Which of the following is/are true? Electromagnetic waves are created by accelerating charges. Electromagnetic waves are transve

Vikki [24]

Answer:

All of the above are true.

Explanation:

(a). true

whenever charge particle move back and froth from its mean position then it will produce oscillating electric and magnetic fields, . so an em wave can be obtain by accelerating charge

(b). true

the electric field and the magnetic field have vibrations in the perpendicular direction along the motion of the wave so electromagnetic wave is a transverse wave. therefore, the EM wave is a Transverse wave

(c) true .

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(d) true .

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so , all of the above are true.

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3 years ago