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dsp73
2 years ago
8

A net force must be acting when an object Choose one or more: A. changes direction but not speed. B. changes both speed and dire

ction. C. accelerates. D. changes speed but not direction.
Physics
1 answer:
Dafna11 [192]2 years ago
5 0

Answer:

C. accelerates.

D. changes speed but not direction.

Explanation:

• When the body accelerates, the net force increases, when changes speed, acceleration changes and force as well.

{ \rm{force = mass \times acceleration}}

» So, the force is determined by acceleration.

{ \rm{force = mass \times ( \frac{ \delta \: speed}{time}) }} \\

» Also force is determined by change in speed

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A rocket travels 1.3 km in 62 ms. What is its average speed in m⋅s−1? Do not give your answer in scientific notation. The answer
hjlf

Answer:

Average speed = 0.35 m/s

Explanation:

Given the following data;

Distance = 1.3 Km

Time = 62 minutes

To find the average speed in m/s;

First of all, we would convert the quantities to their standard unit (S.I) of measurement;

Conversion:

1.3 kilometres to meters = 1.3 * 1000 = 1300 meters

For time;

1 minute = 60 seconds

62 minutes = X

Cross-multiplying, we have;

X = 62 * 60

X = 3720 seconds

Now, we can calculate the average speed in m/s using the formula;

Speed = \frac {distance}{time}

Speed = \frac {1300}{3720}

Average speed = 0.35 m/s

7 0
3 years ago
Concave lenses have
Scilla [17]

Answer:

A. negative; virtual.

Explanation:

A concave lens always forms a virtual erect and diminished image. The reason why is that the image is actually formed by the intersection of virtually extended refracted rays.

Hope this helps!

Please mark as brainliest if correct!

3 0
1 year ago
theres two cups on a board - one half full and one empty. which one will fall off quicker while lifting the board up?
34kurt
The half empty will fall quicker

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6 0
3 years ago
ANWER 3 QUESTIONS WITH THE CORRECT ANSWER 24 POINTS
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4 0
3 years ago
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