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Deffense [45]
3 years ago
7

Watt, which is a unit of power, is equal to ____ a) a joule divided by a second b) a joule times a meter c) a joule times a seco

nd d) a joule divided by a meter
Physics
2 answers:
djyliett [7]3 years ago
8 0

<u>Answer:</u> Watt, a unit of power is equal to a joule divided by a second

<u>Explanation:</u>

Power is defined as the ratio of rate of work done by an object.  It is measured in Watt.

Mathematically,

P=\frac{W}{t}

where,

W = work done by the object. It is measured in Joules

t = time taken by the object. It is measured in seconds

So, the unit of watt is equal to a joule divided by a second.

Hence, Watt, a unit of power is equal to a joule divided by a second

Likurg_2 [28]3 years ago
3 0

Power is the RATE of use, flow, or transfer of energy.

1 watt = 1 joule PER SECOND.

The correct choice is ' <em>a</em> '.

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3 years ago
What do you mean by kinetic energy and potential energy ?
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4 0
1 year ago
Are these two correct ?
gulaghasi [49]

Answer:

7. Your answer is correct dear, just add the unit

8. answer is 1.17m/s²

Explanation:

queation 7.

m = 3kg, F = 9N, a ?

F = ma

a = F/m = 9/3 = 3m/s²

Use the same approach for question 8

5 0
3 years ago
A man attempts to pick up his suitcase of weight ws by pulling straight up on the handle. However, he is unable to lift the suit
kvasek [131]

Answer:

b)

Explanation:

Normal force, is always directed upward the surface over which is placed the object, and can adopt any value, as required to meet Newton's 2nd Law.

In this case, as the external force on the suitcase pulls upward, in order  to counteract the influence of gravity, normal force is less than the weight of the suitcase, as follows:

F + Fn = m*g

⇒ Fn = m*g - F

So, the normal force is equal to the magnitude of the weight of the suitcase (m*g) minus the magnitude of the force of the pull (F) which is the same expressed by the statement b.

4 0
3 years ago
1. George is traveling to Boston from Springfield. Springfield is 144
denpristay [2]

Answer:

48 kilometers per hour

Explanation:

144/3 = 48 km/h

3 0
2 years ago
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