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Anvisha [2.4K]
3 years ago
6

A truck slows down. Which claim about the forces acting on the truck must be true? Choose 1 answer: Choose 1 answer: (Choice A)

A There are no forces on the truck. (Choice B) B There is no net force on the truck. (Choice C) C There is not enough information. (Choice D) D There is a net force on the truck.
Physics
1 answer:
Pie3 years ago
4 0

Answer:

"There is a net force on the truck" is true about the forces acting on the truck.

Explanation:

When truck is in contact with the road and is moving, several forces acts on the moving truck.

The net force is a sum of the forces that acts in opposite directions and same directions. When the truck is moving there is a normal force of the road acting upwards which is balanced by the weight of the truck that acts downward.

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<u>Explanation:</u>

<u>Given:</u>

m = 0.5 kg

PE = 50 J

We know that the Potential energy is calculated by the formula:

P. E = m \times g \times h

where m is the is mass in kg;  g  is acceleration due to gravity which is 9.8 m/s  and  h  is height in meters.

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Potential Energy is the amount of energy stored when an object is stationary.

Here, if we substitute the values in the formula, we get

P. E = m \times g \times h

50 = 0.5 × 9.8 × h

50 = 4.9 × h

h = \frac {50} {4.9}

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