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3 years ago

Could a car drive on a frictionless surface? Explain using the terms action

Physics

1 answer:

Julli [10]3 years ago

7 0

Answer:

No, it cannot. The car needs the friction of the surface to drive because the car pushes the surface backwards, and the surfaces makes a reaction force pushing the car forward, and that works because of the friction. In a frictionless surface the tires would rotate in the same place

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Consider a solenoid of length L, N windings, and radius b (L is much longer than b A current I). is flowing through the wire. If

wolverine [178]

Answer:

The magnetic field inside the solenoid would decrease by a factor of 2.

Explanation:

The magnetic field, B, of a solenoid of length L, N windings, and radius b with a current, I, flowing through it is given as:

B = (N * r * I) / L

If the length of the solenoid is doubled, 2L,the magnetic field becomes:

B2 = (N * r * I) / 2L

B2 = ½ B

The magnetic field will decrease by a factor of 2.

5 0

3 years ago

The image messed up but you get the point. Don't be mean and just answer to get the points, please and thank you.

Katarina [22]

Answer:

Answer is A, it will pass through to focal point after reflecting.

Explanation:

I had the same question in a test, Sorry that you had to do this question in middle school.

4 0

3 years ago

The forces acting on a sailboat are 390. N south and 180. N east. If the boat (including

velikii [3]

Answer:

180^2 + 390^2 = force ^2 (Pythagoras) root of force^2 = 429.5N approx resultant force Acceleration = Force/Mass 429.5/270 = 1.5907 ms^-2 in a Southwesterly direction.

Explanation:

4 0

3 years ago

Which of the following statements are true? The internal resistance of a battery decreases with decreasing temperature. A batter

Eddi Din [679]

Answer:

Option B

Explanation:

The obstruction offered by the battery is known as its internal resistance. Electricity is produced by the chemical reactions inside the battery. The pace of the responses is straightforwardly relative to the temperature and the power delivered by the battery increments. In this way, the inward opposition of the battery increments as diminishing the temperature.
The battery is a gadget which generates electrical energy by the chemical reactions that takes place inside it.

In this way, the announcement a battery is a gadget that produces electricity by the transformation of chemical energy into electrical energy is valid.
The potential difference between the terminals of a battery, when no current is streaming into an outer circuit is called emf of the battery and if the potential distinction is measure when the current is streaming into the outside circuit is called terminal voltage .
The battery attempts to move the negative charge from the low potential terminal to the high potential terminal of the battery. The potential vitality of the negative charges is high at the lower potential terminal and the potential vitality of the negative charge is low at the high potential terminal. Along these lines, the battery attempts to move the charges from high potential terminal to low potential terminal.

7 0

3 years ago

boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m. Calculate

Levart [38]

(a) The mechanical advantage of the ramp is determined as 2.5.

(b) The pulley provides additional advantage since it assisted the boy in pulling up the load.

<h3>What is mechanical advantage?</h3>

The mechanical advantage of an object is the ratio of output force to input force, hence it is called force ratio.

<h3>Mechanical advantage of the ramp</h3>

M.A = Lp/h

where;

Lp is the length of the inclined plane
h is height of the inclined plane

M.A = 10/4

M.A = 2.5

Learn more about mechanical advantage here: brainly.com/question/25984831

#SPJ1

8 0

2 years ago