All categories

3 years ago

Akbar and Lucia apply opposing forces on a

Physics

1 answer:

iragen [17]3 years ago

3 0

Answer:

20 N

Explanation:

We can solve this problem by applying Newton's second law of motion, which states that the net force applied on an object is equal to the product between the mass of the object and its acceleration:

$F=ma$

where

F is the net force

m is the mass

a is the acceleration

In this problem, we have:

m = 10 kg is the mass of the cart

$a=2 m/s^2$ is the acceleration

So the net force on the car is

$F=(10)(2)=20 N$

Since Lucia and Akbar are pushing into opposite directions, this means that this net force is the resultant of the two forces: and since the cart is accelerating towards Akbar, this means that Lucia is applying a force 20 N stronger than Akbar.

You might be interested in

The gravitational potential energy of the ball changes as it bounces. Where is the ball located when its gravitational potential

Cloud [144]

When the planet is closest to the Sun, speed v and kinetic energy are the highest, and gravitational potential energy is the lowest. When the planet moves farther away, the speed and kinetic energy decrease, and the gravitational potential energy increases.

5 0

3 years ago

A ball drops some distance and gains 30 J of kinetic energy. How much gravitational potential energy did the ball start with? Do

Dovator [93]

Answer:

The gravitational potential energy of the ball is more than 30 J.

Explanation:

Given that,

Gains kinetic energy = 30 J

We need to calculate the gravitational potential energy

According to law of conservation of energy

If there is no air resistance then the potential energy of the ball fully converted into kinetic energy.

If the air resistance is considered then the potential energy used to do work against air resistance.

$\Delta U\geq \Delta K.E$

According to question,

A ball drops some distance and gains 30 J of kinetic energy and considers air resistance then 30 J of potential energy can be loosed by the ball.

Hence, The gravitational potential energy of the ball is more than 30 J.

4 0

3 years ago

4. Sally applies a horizontal force of 462 N with a rope to drag a wooden crate across a floor with a constant speed. The rope t

34kurt

Answer:

-6,329.5Joules

Explanation:

Complete question:

Sally applies a horizontal force of 462N with a rope to drag a wooden crate across a floor with a constant speed the rope tied to the crate is pulled at an angle of 56.0degree and sally moves the crate 24.5m. What work is done by the floor through the force of friction between the floor and crate.

Work done = Fd cos theta

F is the horizontal force

d is the distance covered

theta angle of inclination

Substituting into the formula

Workdone = 462(24.5)cos 56

Workdone = 11,319(0.5592)

Workdone = 6,329.5Joules

Hence the workdone by sally is 6,329.5Joules

The work done by friction will be opposite the work done by sally, hence work done by the floor through force of friction between the floor and the crate is -6,329.5Joules

6 0

3 years ago

What is linear momentum?

andreyandreev [35.5K]

Linear momentum is a vector quantity defined as the product of an object’s mass and it's velocity

5 0

3 years ago

A concert loudspeaker suspended high off the ground emits 39 w of sound power. a small microphone with a 1.0 cm2 area is 60 m fr

Gelneren [198K]

As we know that intensity of sound is defined as power received per unit area

so here the power of source is given as

$P = 39 W$