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3 years ago

If a force acting on an object is multiplied how is product called work?

1 answer:

6 0

Work is equal to the force applied to an object multiplied by the distance it had travelled. This is work as long as the force and the direction of the distance in going in the same direction.

It is work because you're applying a force on an object to move it.

For example, work is done when you push a box across the floor, but work is not done when you lift the box up and then walk it across the room. This is because the force on the box is upwards since you're lifting it and the direction of the distance is left or right so the directions are not the same.

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Anvisha [2.4K]

Based on the nature of reflection of light from surfaces, smooth surfaces produce regular reflection while rough surfaces produce diffuse reflection.

<h3>What is reflection of light waves?</h3>

Reflection of light waves refers tobtye bouncing back of light waves when they hit a shiny surface.

Depending on the nature of the surface, reflection of light waves can either be regular if diffuse.

Smooth surfaces produce regular reflection while rough surfaces produce diffuse reflection.

Based on the properties of reflection:

A microscopic view of a sheet of paper shows that the surface is rough, thus it would produce diffuse reflection.
Rough pages are easier to read from than smooth and glossy surfaces because they produce diffuse reflection while reading off smooth surface causes a glare due to intense regular reflection
A wet road appears darker because more light passes through and it reflects less light and looks darker
diffuse reflection do not all pass through the principal focus, thus an image is not formed off a rough surface

Therefore, it can be concluded that the rough surfaces produce diffuse reflection while smooth and glossy surfaces produce regular reflection.

Learn more about reflection at: brainly.com/question/377660

4 0

2 years ago

A 2-kg wood block is pulled by a string across a rough horizontal floor. The string exerts a tension force of 30 N on the block

Luden [163]

Answer:

Work done, W = 84.57 Joules

Explanation:

It is given that,

Mass of the wooden block, m = 2 kg

Tension force acting on the string, F = 30 N

Angle made by the block with the horizontal, $\theta=20^{\circ}$

Distance covered by the block, d = 3 m

Let W is the work done by the tension force. It can be calculated as :

$W=F\ cos\theta\times d$

$W=30\times cos(20)\times 3$

W = 84.57 Joules

So, the work done by the tension force is 84.57 Joules. Hence, this is the required solution.

7 0

3 years ago

The acceleration of an object can be described by the equation a=2d/t^2, where a is acceleration d is the distance, and t is tim

kherson [118]

As described above, the acceleration of the object is given by the equation, a=2d/t^2. If the object accelerates at a distance of 15 meters, then it can be said that the acceleration will be doubled as compared to the previous with the same time squared. Time can be related by the equation,
t=sqrt of 30/a

8 0

3 years ago

Which is true concerning the acceleration due to Earth's gravity (ge) ? It decreases with increasing altitude. B. It is differe

klasskru [66]

Answer:

Option A decreases with increase in altitude

Explanation:

This can be explained as the value of gravitational acceleration, 'g' is not same everywhere.

It has its maximum value at poles of the Earth and minimum on its equator.

Thus a person will weigh more at poles than equator.

This variation is in accordance to:

$g = \frac{GM_{E}}{radius^{2}}$

Thus the gravitational acceleration changes as inverse square of the Radius of the Earth.

Thus as we move away from the Earth's center, gravitational acceleration, g decreases.

6 0

3 years ago

Jenna rides her scooter at a constant speed for 6 km. That part of her ride takes her 1 h. She then

AfilCa [17]

Answer:

5km/h

Explanation:

The equation for average speed is

Vavg = Δd/Δt

where Δd is distance and Δt is time

from what's given, we know she travelled 15km in total and the trip took 3 hours in total. We can now plug in the values into the equation

Vavg = 15/3

Vavg = 5km/h

4 0

3 years ago