All categories

3 years ago

What two things are necessary for work to be done on an object?

Physics

1 answer:

NemiM [27]3 years ago

6 0

Answer: Force and Movement

Explanation:

The first is that the object moves. The second is that a force must act on the object in the direction the object moves.

You might be interested in

The car starts from a room with a constant acceleration of 5 ms-2. What path will it pass in 6 seconds and what speed will it re

Kobotan [32]

Answer: The speed will be 30 m/s .

Explanation:

Given: Initial velocity of the car: u = 0 m/s

Constant Acceleration: a = 5 m/s²

Time: t= 6 seconds

To find: Final velocity(v)

Formula: v = u+at

Substitute values in the formula, we get

v= 0+(5)(6) m/s

⇒ v= 30 m/s

i.e. Final velocity = 30 m/s

Hence, the speed will be 30 m/s .

4 0

3 years ago

How much heat is required to convert 12.0 g of ice at -10.0°C to steam at 100.0°C. Express your answer in joules, calories, and

Kruka [31]

You can’t solve it because you don’t have c in the question

3 0

2 years ago

A source produces 20 crests and 20 troughs in 4 seconds. The second crest is 3 cm away from the first crest.Calculate :

sineoko [7]

Answer:

Solution given:

No of waves[N] =20crests & 20 troughs

=20waves

Time[T]=4seconds

distance[d]=3cm=0.03m

Now

Wave length=3cm=3 × ${10}^{ - 2}m$

Frequency= $\frac{No of waves}{time}$

= $\frac{20}{4}$ =5Hertz

and

Wave speed:wave length×frequency=3 × ${10}^{ - 2}m$ ×5=1.5 × ${10}^{ - 1} \tt{ {ms}^{ - 1}}$ .

3 0

3 years ago

Which statement best describes how private industry decides where to spend on research and development

WINSTONCH [101]

You didnt put the statements

4 0

3 years ago

A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is

Stolb23 [73]

<h2>Option A is the correct answer.</h2>

Explanation:

When an elevator moves upward with consonant acceleration a, the overall acceleration on the body is given by

a' = a + g

So acceleration of pendulum is a + g.

We have equation for period of simple pendulum

$T=2\pi \sqrt{\frac{l}{a'}}$

In normal case a' = g here a' is more.

From the equation we can see that period of simple pendulum is inversely proportional to square root of acceleration.

Since acceleration increases period decreases.

Option A is the correct answer.

8 0

3 years ago

Read 2 more answers