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Ilya [14]
3 years ago
14

1.2

Physics
2 answers:
Grace [21]3 years ago
5 0
C. Putting a second brick on it

force of friction = mu (coefficient of friction) * normal force

normal force = mass * force of gravity

In order to increase the frictional force, mass must be added to increase the normal force and thus the amount of applied friction.
Alika [10]3 years ago
3 0

Answer:

B

Explanation:

Because it has to increase

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180 cm, what

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3 years ago
A 2.4-kg cart is rolling along a frictionless, horizontal track towards a 1.7-kg cart that is held initially at rest. The carts
inessss [21]

Answer:

Explanation:

Mass of first cart M1=2.4kg

Velocity of first cart U1=4.1m/s

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Second cart is initially at rest U2=0

After an instant, the velocity of the second cart is U2=-2.8m/s

Now after collision the two cart move together with the same velocity I.e inelastic collision

Using conservation of momentum

Momentum before collision, = momentum after collision

M1U1 + M2U2 = (M1+M2)V

2.4×4.1 + 1.7× -2.8 =(2.4+1.7)V

9.84 - 4.76 = 4.1V

5.08=4.1V

V=5.08/4.1

V=1.24m/s

The momentum of the two cart at that instant is

M1U1+M2U2

2.4×4.1 + 1.7× -2.8

9.84 - 4.76

5.08kgm/s

So the momentum at the instant the velocity is 4.1m/s for cart 1 and -2.8m/s for cart 2 is 5.08kgm/s

3 0
3 years ago
Why will air sink if it is colder than the air around it? ​
yawa3891 [41]

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The molecules in hot air are moving faster than the molecules in cold air.

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A would be the best answer beacuse
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D (it was produced by cyanobacteria)!!!
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3 years ago
Read 2 more answers
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