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2 years ago

Help with this question plz and show how you got it :) tysm!

Physics

1 answer:

spayn [35]2 years ago

5 0

The hardest part of the job is to find the right formula to use, and write it down. You've already done that ! The rest is just turning the crank until an answer falls out.

You wrote. E = m g h.
Beautiful.
Now divide each side by (g h), and you'll have the formula for mass:

m = E / (g h).

You know all the numbers on the right side. Just pluggum in, do the arithmetic, and you'll have the mass.

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1. A particle has a mass of 10 kg and a velocity of 5 m/s. What is the momentum of the particle?

Aleksandr [31]

✰ Concept :-

⠀

We know that momentum is the product of mass and velocity. Thus, by the following definition, we get :-

⠀

$\qquad \maltese \: \underline{ \boxed{ \purple{ \sf Momentum = Mass \times Velocity }}} \: \star$

⠀

✰ Given Information :-

⠀

A particle has mass 10 kg
Moving with velocity 5 m/s

⠀

✰ To Find :-

⠀

The momentum of the particle

⠀

✰ Solution :-

⠀

Using the formula from the concept section, we get :-

⠀

$\sf \longrightarrow Momentum =10 \: kg \times 5 \: {m}^{ - 1} ~~~ \\ \\ \\\sf \longrightarrow Momentum = {50~kg \: ms}^{ - 1} \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \\ \sf \longrightarrow \underline{ \boxed{ \frak{ \orange{Momentum = {50 ~kg\: ms}^{ - 1} }}}} \: \star \: \: \: \: \: \: \\ \\$

Thus, the momentum of the particle is 50 kg m/s.

⠀

$\underline{ \rule{230pt}{2pt}} \\ \\$

8 0

2 years ago

A cargo elevator on Earth (where g = 10 m/s2) lifts 3000 kg upwards by 20 m. 720 kJ of electrical energy is used up in the proce

MakcuM [25]

Answer: 83%

Explanation:

Efficiency of the process = work output/work input × 100%

Work input is the energy used up in the process = 720,000Joules

Work output = Force × distance

= (3000×10)× 20

= 600000 Joules

Efficiency= 600000/720000 × 100

= 0.83×100

= 83%

8 0

2 years ago

Ira is concerned about his posture. He tests it by seeing how long he can hold good posture and finds that he feels the most dis

larisa [96]

Answer: C

Explanation:

JUST TO SIMPLE

6 0

2 years ago

One plane departed from New York, and at the same time another plane departed from Mexico City. They flew toward each other at r

sdas [7]

Answer:

30 hours

Explanation:

Average speed = distance/time

Let the time taken for each plane to pass each other be t

Average speed of plane that left from New York = 650 mph

Distance covered = 650t miles

Average speed of plane that left from Mexico = 550 mph

Distance covered = 550t miles

Distance apart = 3000 miles

650t - 550t = 3000

100t = 3000

t = 3000/100 = 30 hours

3 0

2 years ago

Read 2 more answers

Eratosthenes determined the circumference of Earth by conducting an experiment. Put his steps in order as they correlate to the

galben [10]

Solution: The correct order is: C, A, B

The statement of the problem:

How can we prove Earth is round and calculate its circumference?

Hypotheis:

If the sun casts shadows at different angles at the same time of day in different places, we can determine how much Earth curves.

If the Earth was flat, the angle measured at different places at the same time of the day would be same.

Observation:

In Syene, the sun's rays are vertical at noon. At the same time in Alexandria, the rays are 7.2 degrees from the vertical.

5 0

3 years ago