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2 years ago

True or False : If a car drives on a road for a nonzero amount of time, then its average velocity must be nonzero.

Physics

1 answer:

kirza4 [7]2 years ago

7 0

Answer:

Your answer would be:
B.) False

If a car drives on a road for a nonzero amount of time, then its average velocity must be nonzero.

If a car drives for a nonzero amount of time, then its average acceleration must be nonzero.

Explanation:

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When pushing on a wall while wearing skates, what provides the force that causes you to accelerate away from the wall?

Kruka [31]

Vision and there lies

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2 years ago

What is the momentum of a 2.0kg ball rolling at 6.0 m/s

irga5000 [103]

Momentum can be defined by the formula p=m*V (where m is mass and V is velocity) so if we plug in these numbers:

p = 2kg * 6m/s
p = 12 kgm/s

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3 years ago

At the end of the movie Titanic, Rose lies on a piece of furniture, floating in the ocean, and Jack drowns. A common objection p

julsineya [31]

Answer:

If jack is in the piece of furniture it would submerge.

Explanation:

The piece of furniture would submerge if the weight applied on the furniture is greater than the maximum buoancy force the water can provide.

maximum buoacy force = density of liquid × volume submerged× acceleration due to gravity.

= $1025\times v\times 9.8$

v = area × thickness of pine

$1.5\times 5\times 10^{-2}$

= 0.075 $m^{3}$

therefore buoancy force = 1025×0.075×9.8 N

= 753.375 N

weight of rose alone = 46×9.8 N = 450.8 N

weight of jack alone = 58×9.8 = 568.4 N

weight of pine = density of pine × volume of pine

= 350 × 0.075= 26.25 N

weight of pine + weight of rose = 450.8+26.25=477.05 N

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4 0

3 years ago

Worth 50 point!!!

olasank [31]

Answer:

Chief Hopper

Explanation:

Mike travels at a constant speed of 3.1 m/s. To find how long it takes him to reach the school, we need to find the distance he travels. We can do this using Pythagorean theorem.

a² + b² = c²

(1000 m)² + (900 m)² = c²

c ≈ 1345 m

So the time is:

v = d / t

3.1 m/s = 1345 m / t

t ≈ 434 s

Next, Chief Hopper travels a total distance of 1900 m, starting at rest and accelerating at 0.028 m/s². So we can use constant acceleration equation to find the time.

d = v₀ t + ½ at²

1900 m = (0 m/s) t + ½ (0.028 m/s²) t²

t ≈ 368 s

So Chief Hopper reaches the school first, approximately 66 seconds before Mike does.

3 0

3 years ago

In a circuit, the supplied voltage is 1.5 volts, and the resistor value is 3 ohms. What is the current in the circuit?

pogonyaev

Using Ohm's Law:

V = IR

Where V = Voltage in Volts, I = Current in Ampere, R = Resistance in Ohms

V = IR

1.5 = I * 3

1.5 = 3I

3*I = 1.5

I = 1.5/3

I = 0.50 A

Current in the Circuit is 0.50 Ampere.

6 0

3 years ago