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eduard
3 years ago
11

A toy car was used in an investigation about unbalanced forces. During which of the following scenarios was the car not experien

cing an unbalanced force? *
20 points
1.The toy car speeds up as it rolls down a ramp.
2.The toy car travels forward at a constant speed.
3.The toy car slows down as it rolls up a hill.
4.The toy car changes direction at a constant speed.
Physics
2 answers:
lozanna [386]3 years ago
7 0
Number 2, the question asked which car was not experiencing a unbalanced force. number 2 says the car is traveling at a constant speed signifying that nothing was in the cars way allowing it to travel with ease
Firlakuza [10]3 years ago
4 0

Answer:

Number 2

it is using Newton’s first law.

also known as the law of inertia

look that last word up

Explanation:

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From someone who has taken physics this is, True
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3 years ago
You are driving at 75 km/h. Your sister follows in the car behind at 75 km/h. When you honk your horn, your sister hears a frequ
OLga [1]

The ideal concept for solving this question is based on the Doppler effect, for which it is indicated that the source's listening frequency changes as the distance and the relative speed between the receiver and the transmitter are also changed. However, if the relative velocity between the two objects is zero as in the particular case presented (since both travel at 75km / h) we have that there will be no change in frequency.

Therefore the frequency that I hear and that my sister would listen would be the same.

5 0
3 years ago
An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )
Furkat [3]
KE = 1/2 * m * v2

We have to rearrange this so the subject is mass. (because the question asks for the mass of the object) :

Mass = (2 * KE) / v

Now input the values into this equation to get your answer :

Mass = (2 * KE) / v
Mass = (2 * 480) / 8
Mass = 960 / 8
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7 0
3 years ago
Read 2 more answers
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Grace [21]

Answer:

Bernoulli is A

Archimedes is B

Pascal is C

Explanation:

Hope this helps dude

7 0
3 years ago
Read 2 more answers
1) A speaker vibrates at a frequency of 2500 Hz. What is its period?
yarga [219]

It's easier for you to solve these than to try and read my solutions if I solve them.

Use this magic formula:

(period) · (frequency)  =  1

If you handle the magic formula carefully and correctly, you can get these facts out of it:

--  Period =  1 / frequency

-- Frequency =  1 / period

Use the first one to solve #1.

Use the second one to solve #2.

7 0
3 years ago
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