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ahrayia [7]
3 years ago
12

A car is moving straight down a highway. what factor has the greatest influence on how much work must be done on the car to brin

g it to a complete stop?
Physics
1 answer:
Fiesta28 [93]3 years ago
4 0
The work required to stop the car is equal to the amount of kinetic energy that the car currently has. This is given by E=(1/2)mv^2. Since the energy is proportional to the square of the velocity, that factor will have the greatest influence on the work required to stop it.
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if for every force there is an equal and opposite reaction force, how is it possible for an object to accelerate
lesya692 [45]

Answer:

By the use of the reaction force one body is able to accelerate because it is not fixed to a rigid support which offers a materialistic resistance.

Explanation:

For every  force there is an equal and opposite reaction is stated in the Newton's third law of motion holds true universally.

This law accounts for the acceleration of the bodies with respect to the object that applies force on the other body. The acceleration is possible when iether one of the body is fixed and cannot move or when that both the bodies are not fixed can move.

  • For example consider a rocket with its engine started. This rocket generates upthrust by conversion of chemical energy of the fuel into the mechanical energy applying force on the launchpad. When this force is large enough it to lift the rocket then the rocket starts moving in the air and it  accelerates. Now, when it is in the air or in vacuum during the course of its journey it uses the reaction of the burnt gases of the fuel to change the momentum.

This is in accordance with the Newton's second law of motion, stating that the Force is directly proportional to the rate of change in momentum.

8 0
3 years ago
1) An average soccer ball has a mass of .4 kg. If a soccer ball is kicked with a force of 750 Newtons, what is the acceleration
Y_Kistochka [10]

Answer:

Explanation:

#1 uses Newton's 2nd Law: F = ma so filling in:

750 = .4a and

a = 1875 m/s/s

#2 uses d = rt so

d = 12.3(25) and

d = 307.5 m

5 0
3 years ago
I need the answer to (c): Describe how the student accurately traces the path of the light emerging from the block through side
Artyom0805 [142]

Explanation:

i guess using a ruler.so first on the opposite side use your eye to alighn the ruler to the light from Ray box then draw a line or you can use pins and place them alighned to the Ray box an draw a line connecting the pins

3 0
3 years ago
Use the drop-down menus to order the steps for writing chemical formulas. Balance the charges. Identify the negative ion and cha
daser333 [38]

Answer:

The order of steps for writing a chemical formula is 3, 2, 1, 5, 4

Explanation:

Balance the charges. Identify the negative ion and charge. Identify the positive ion and charge. Use the information in the ratio to write the chemical formula. Write the ratio of ions that balances the charges.

The order of steps for writing a chemical formula from the options above is:

3.) Identify the positive in and charge.

2.) Identify the negative ion and charge.

1.) Balance the charges.

5.)Write the ratio of ions that balances the charges.

4.) Use the information in the ratio to write the chemical formula.

6 0
3 years ago
A car rounds a curve while maintaining a constant speed. Is there a net force on the car as it rounds the curve?
Nesterboy [21]

Answer:

Yes, Centripetal Force acts on the Car.

Explanation:

When a car undergoes a circular motion, a centripetal force acts onto it.

Centripetal Force = [m*(v^2)]/R , where

  • R is the radius of curve
  • v is the constant speed
  • m is the mass of the car
4 0
4 years ago
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