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3 years ago

A stone of mass 0.2 kg falls with an acceleration of 10.0 m/s. How big is the force that causes this acceleration?

Physics

1 answer:

Kobotan [32]3 years ago

4 0

Answer:

$\boxed {\boxed {\sf 2 \ Newtons}}$

Explanation:

According to Newton's Second Law of Motion, force is the product of mass and acceleration.

$F= m \times a$

The mass of the stone is 0.2 kilograms and the acceleration is 10.0 meters per square second.

m= 0.2 kg
a= 10.0 m/s²

Substitute the values into the formula.

$F= 0.2 \ kg * 10.0 \ m/s^2$

Multiply.

$F=2 \ kg*m/s^2$

Convert the units.

1 kilogram meter per square second (kg*m/s²) is equal to 1 Newton (N)
Our answer of 2 kg*m/s² is equal to 2 N

$F= 2 \ N$

The force is <u>2 Newtons.</u>

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A 750-kg automobile is moving at 26.2 m/s at a height of 5.00 m above the bottom of a hill when it runs out of gasoline. The car

Kisachek [45]

To solve this problem it is necessary to apply to the concepts related to energy conservation. For this purpose we will consider potential energy and kinetic energy as the energies linked to the body. The final kinetic energy is null since everything is converted into potential energy, therefore

Potential Energy can be defined as,

$PE = mgh$

Kinetic Energy can be defined as,

$K= \frac{1}{2} mv^2$

Now for Conservation of Energy,

$KE_i+PE_i = PE_f$

$\frac{1}{2}mv_i^2+mgh_1 = mgh_2$

$\frac{1}{2} (750kg) (26.2m/s)^2 + (750)(9.8)(5) = (750)(9.8)h_2$

$h_2 = 40.0224m$

Therefore the highets position the car reaches above the bottom of the hill is 40.02m

6 0

4 years ago

A 970 kg car starts from rest on a horizontal roadway and accelerates eastward

a_sh-v [17]

Answer: 4850N

Explanation:

Mass of car = 970 kg

Time = 5 s

Speed = 25 m/s

Average force exerted on the car = ?

Recall that Force is the product of the mass of an object and the acceleration by which it moves

i.e Force = mass x acceleration

(Since, acceleration is the rate of change of velocity or speed per unit time)

i.e Acceleration = Speed / Time

Acc = 25m/s / 5s

Acc = 5m/s^2

Average force = mass x acceleration

Avg force = 970 kg x 5m/s^2

= 4850N

Thus, the average force exerted on the car is 4850 Newton

4 0

3 years ago

How to reword this? What does it mean?

schepotkina [342]

This passage is about how people research food, how much calories, much much energy you get from it, etc. It also explains the different kinds of food get a certain amount of calories. Some calories burn quicker than the other.

5 0

3 years ago

A net force of 100 N is applied to a wagon for five seconds. This causes the wagon to undergo a change in momentum of

baherus [9]

Answer:

500 Ns

Explanation:

According to the impulse theorem, the change in momentum of an object is equal to the impulse exerted on it. Mathematically:

$\Delta p = I = F \Delta t$

where

$\Delta p$ is the change in momentum of the object

I is the impulse exerted, which is the product of

F, the net force exerted

$\Delta t$ , the time interval during which the force is applied

In this problem,

F = 100 N is the force applied on the wagon

$\Delta t=5 s$ is the time interval

Substituting, we find the change in momentum of the wagon:

$\Delta p = (100)(5)=500 Ns$

5 0

4 years ago

A force that causes an object to change its motion is called?

GarryVolchara [31]

Unbalanced force.

The definition of an unbalanced force is a force that changes the position, speed or direction of the object to which it is applied.

When an object is still it means that is is balanced force. So you would need to add more force to another side to make it move. Which is unbalanced force.

8 0

3 years ago