The amount of work done by two boys who apply 200 n of force in an unsuccessful attempt to move a stalled car is?

Answers

Answer 1

Answer: Work = (force) x (distance)

It doesn't matter if the whole football team is pushing on it.
Until the car moves, no work has been done.

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1. A rifle with a longer barrel can fire bullets with a larger velocity than a rifle with a shorter barrel.

a person pushing a stroller starts from rest, uniformly accelerating at a rate of 0.500m/s^2. what is the velocity of the stroller after it has traveled 4.75m?

Answers

You're going to use the constant acceleration motion equation for velocity and displacement:
(V)final²=(V)initial²+2a(Δx)

Given:
a=0.500m/s²
Δx=4.75m
(V)intial=0m
(V)final= UNKNOWN

(V)final= 2.179m/s

Hello!

A person pushing a stroller start from rest uniformly accelerating at a rate of 0.500 m/s². What is the velocity of the stroller after it traveled 4.75 m ?

We have the following data:

a (acceleration) = 0.500 m/s²

Vf (final velocity) = ? (in m/s)

Vi (initial velocity) = 0 m/s

Δx (displacement) = 4.75 m

Solving:

Let's apply the Torricelli Equation, to find the velocity of the stroller, let's see:

$V_f^2 = V_i^2 + 2*a*\Delta{x}$

$V_f^2 = 0^2 + 2*0.500*4.75$

$V_f^2 = 0 + 4.75$

$V_f^2 = 4.75$

$V_f = √(4.75)$

$\boxed{\boxed{V_f \approx 2.18\:m/s}}\:\:\:\:\:\:\bf\blue{\checkmark}\bf\green{\checkmark}\bf\red{\checkmark}$

Answer:

The velocity of the stroller is approximately 2.18 m/s

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A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. How much work is done by the worker on the wheelbarrow

Answers

The work done will be "250 J".

According to the question,

Force, F = 50 N
Distance, d = 5 m

The work done is:

→ $Work \ done = Force* Distance$

or,

→ $W = F* D$

By substituting the values, we get

$= 50* 5$

$= 250 \ J$

Thus the above response is correct.

Learn more about work done here:

brainly.com/question/21386378

Work Done = force • distance
Work Done = 5m • 50N
Work Done = 250J

Answer: 250 Joules

What is the definition of an unbalanced force?

Answers

an unbalanced force is Forces that are not equal

Final answer:

An unbalanced force occurs when the forces acting on an object are not equal and opposite, causing a change in the object's motion. This is dictated by Newton's second law of motion. When forces are balanced, the object remains at rest or continues its motion unchanged.

Explanation:

An unbalancedforce refers to a scenario in which the forces acting on an object are not equal in magnitude and direction, causing a change in the motion of the object. In accordance with Newton's second law of motion, the motion change is directly proportional to the total unbalanced force and occurs in the direction of that force. Exceptionally, if the forces acting on an object are balanced, the object will either stay at rest or continue moving with a constant velocity, since the net force equals zero.

Consider this simple example to illustrate the principle. If you push a table to the right with a force of 10 Newtons and nothing pushes back with an identical force, the unbalanced force causes the table to move to the right. This is because there is an unbalanced force exerted upon it. Conversely, if an equal force of 10 Newtons is applied to the table from the opposite direction, these forces are balanced, and the table remains stationary because the net force is zero.

Learn more about Unbalanced Force here:

brainly.com/question/30027554

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Which law of motion accounts for the following statement?"The gravity of the Sun causes the planets to move in a circular path."

Answers

Explanation :

The gravity of the Sun causes the planets to move in a circular path. This is because of Newton's first law of motion.

According to Newton's first law, the body will remain at rest or in uniform motion untill external unbalanced force acts.

There are two forces acting on planets i.e. gravitational force and inertia of their orbits. So, form Newton's first law the planets keeps on moving in a circular path.

The law that accounts for that exact statement is the law that says that
most people don't understand these things very well.

A better statement is:
"The gravitational forces between the Sun and each planet cause each planet
to move in an elliptical path."

The laws that account for that behavior are:

-- Newton's second law of motion: (Force) = (mass) x (acceleration)

-- Newton's law of universal gravity

The mass of cart 1 was 1.10kg and mass of cart 2 is what's being solved for. They were next to each other and a spring was activated and the two carts moved away from each other and produced these readings. Cart 1= v1: .75 m/s and Cart 2= v2: .34m/s. What's the mass of cart 2

Answers

m1v1 + m2v2 = m1v1i + m2v2i
fill it in m1 = mass 1
m2 = mass 2
v1 = velocity 1
v2 = velocity 2

Phileas Fogg, the character who went around the world in 80 days, was very fussy about his bathwater temperature. It had to be exactly 38.0o C. You are his butler, and one morning while checking his bath temperature, you notice that it’s 42.0oC. You plan to cool the 100.0 kg of water to the desired temperature by adding an aluminum-duckie originally at freezer temperature (-24.0oC). Of what mass should the Al-duckie be? [Specific heat of Al = 0.900 J/(goC); density of water =1 .00 g/ml]. Assume that no heat is lost to the air

Answers

Answer:

The mass of the Al-duckie should be 30 kg.

Explanation:

We will use the first law of thermodynamics:

ΔU = m·Cv·ΔT

Since the specific heat of water is 4.185 J(gºC), the change in the water's internal energy would be:

ΔU = 100 kg · 4.185 J(gºC) · (42ºC - 38ºC) = 1674 KJ

Given that no heat is lost, all the internal energy that the water loses while cooling down will transfer to the duckie. So, if the duckie has ΔU = 1674 KJ and its final temperature is the desired 38 ºC, we can calculate its mass using the first law again:

$m=\frac{\Delta{U}}{Cv{\Delta{T}}}=(1674)/(0.9*[38-(-24)])=30Kg$

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