All categories

3 years ago

In order to increase the amount of work done, we need to:

1 answer:

Nadusha1986 [10]3 years ago

8 0

Option (D) is the correct one.

In order to increase the amount of work done, we need to increase the force applied to the object.

You might be interested in

Convert 3 hours 21 minutes to decimal hours.

Oxana [17]

Total hours is 3.35 hours

<u>Explanation:</u>

Given:

convert 3 hours 21 minutes to decimal hours

We know:

1 hour = 60 minutes

and

1 minute = 60 seconds

1 minute = 1 / 60 hours

So,

21 minutes = $\frac{21}{60} hours$

= 0.35 hours

Total hours would be = 3 hours + 0.35 hours

= 3.35 hours

Therefore, total hours is 3.35 hours

7 0

3 years ago

Recall that impulse = momentum (FAt = Ap and that Ap is just mx v). How long (time) must a group of people pull with a force of

elixir [45]

The time taken for the group of people to pull the car, giving it a velocity of 1.5 m/s is 3.75 s

Momentum is simply defined as the product of mass and velocity i.e

Momentum = mass × velocity

To answer the question given, we'll begin by calculating the change in momentum. This can be obtained as follow:

Mass = 1500 Kg

Initial velocity (u) = 0 m/s

Final velocity (v) = 1.5 m/s

<h3>Change in momentum =? </h3>

Change in momentum = m(v – u)

Change in momentum = 1500 (1.5 – 0)

Change in momentum = 1500 × 1.5

<h3>Change in momentum = 2250 Kg•m/s</h3>

Finally, we shall determine the time

Change in momentum = 2250 Kg•m/s

Force (F) = 600 N

Impulse = Ft = change in momentum

FT = change in momentum

600 × t = 2250

Divide both side by 600

t = 2250 / 600

Thus, the time required is 3.75 s

Learn more on momentum and impulse: brainly.com/question/14486244

6 0

2 years ago

Explain the advantage of operating a motor vehicle that is 20% efficient instead of one that is 10% efficient

Jet001 [13]

Save money on fuel and go for longer

5 0

3 years ago

What do you understand by the term intensity of sound

tensa zangetsu [6.8K]

Answer:

It means how loud or how soft an object vibrates.

Explanation:

6 0

3 years ago

A window has a glass surface of 2907 cm2 and a thickness of 5.6 mm. Find the rate of energy transfer by conduction through this

butalik [34]

Answer:

2.30714 W

-16.38071 W

Explanation:

k = Heat conduction coefficient = 0.8 W/(m·°C)

A = Area = 2907 cm²

l = Thickness = 5.6 mm

$T_2$ = Outside temperature

$T_1$ = Inside temperature

Rate of heat transfer is given by

$Q=\frac{kA(T_2-T_1)}{l}\\\Rightarrow Q=\frac{0.8\times 2907\times 10^{-6}\times (81-71)\times \frac{5}{9}}{5.6\times 10^{-3}}\\\Rightarrow Q=2.30714\ W$

The rate of energy transfer is 2.30714 W

$Q=\frac{kA(T_2-T_1)}{l}\\\Rightarrow Q=\frac{0.8\times 2907\times 10^{-6}\times (0-71)\times \frac{5}{9}}{5.6\times 10^{-3}}\\\Rightarrow Q=-16.38071\ W$

The rate of energy transfer is -16.38071 W

7 0

3 years ago