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3 years ago

Explain what will happen if an object has high momentum or low momentum and a force is applied?

1 answer:

5 0

-- If the force is applied in the same direction as the object is moving, then the object's momentum in that direction will increase.

-- If the force is applied in the direction OPPOSITE to the way the object is moving, then the object's momentum will decrease.

-- In either case, the CHANGE in the object's momentum will be

(strength of the force) x (length of time the force is applied) .

This quantity is also called "impulse".

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How does the work required to accelerate a particle from 10 m/s to 20 m/s compare to that required to accelerate it from 20 m/s

poizon [28]

To solve this problem we will apply the energy conservation theorem for which the work applied on a body must be equivalent to the kinetic energy of this (or vice versa) therefore

$W = \Delta KE$

$\Delta W = \frac{1}{2} (m)(v_f)^2 -\frac{1}{2} (m)(v_i)^2$

Here,

m = mass

$v_{f,i}$ = Velocity (Final and initial)

First case) When the particle goes from 10m/s to 20m/s

$\Delta W = \frac{1}{2} (m)(v_f)^2 -\frac{1}{2} (m)(v_i)^2$

$\Delta W = \frac{1}{2} (m)(20)^2 -\frac{1}{2} (m)(10)^2$

$W_1 = 150(m) J$

Second case) When the particle goes from 20m/s to 30m/s

$\Delta W = \frac{1}{2} (m)(v_f)^2 -\frac{1}{2} (m)(v_i)^2$

$\Delta W = \frac{1}{2} (m)(30)^2 -\frac{1}{2} (m)(20)^2$

$W_1 = 250(m) J$

As the mass of the particle is the same, we conclude that more energy is required in the second case than in the first, therefore the correct answer is A.

5 0

3 years ago

What effect does friction have on a moving object? i forgot this pls help tyy

Vsevolod [243]

Answer:it causes the moving object to slow eventually stop

Explanation:

5 0

3 years ago

Question 3 (1 point)

Butoxors [25]

Answer:

The green car had the greatest momentum

Explanation:

Momentum

Momentum can be defined as "mass in motion" and is calculated as the product of the mass of the object by its velocity.

Being v the magnitude of the velocity and m the mass of the object, the momentum is calculated with:

p = mv

The green car had a mass of m1=1200 kg and crossed the finish line at v1=53 m/s. Hence, its momentum was:

p1 = 1200 Kg * 53 m/s = 63600 Kg.m/s

The red car had a mass of m2=1100 kg and crossed the finish line at v2=55 m/s. Hence, its momentum was:

p2 = 1100 Kg * 55 m/s = 60500 Kg.m/s

Since p1 > p2, then the green car had the greatest momentum

8 0

3 years ago

What is meant by anyone zinda ?? xD

PilotLPTM [1.2K]

Answer:

Zinda means alive.

Explanation:

I think it will help you.

5 0

2 years ago

Read 2 more answers

Chloe is playing the flute some distance away from a crowd. If the atmospheric temperature is 15°C, what is the speed of the sou

jok3333 [9.3K]

The solution to your problem is as follows:

speed of sound = 331.4 + 0.61 x T
speed of sound = 331.4 + 0.61 x 15
speed of sound = 331.4 + 9.15
speed of sound = 340.55 m/s

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

5 0

3 years ago