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3 years ago

how difficult is it to start a heavy lorry moving and to stop it moving? (choose one answer from the image provided)

Physics

1 answer:

ale4655 [162]3 years ago

3 0

Answer:

option B

Explanation:

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In the process of melting, what best describes what happens to a solid?

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a. A solid will gain kinetic energy and become a liquid.

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3 years ago

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During the first 40 s a truck traveled at a constant speed of 15 m/s. Find the

kotykmax [81]

Answer:

600 m

Explanation:

Distance = speed × time

= (15)(40)

= 600 m

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3 years ago

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4 years ago

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How much energy is needed to generate 0.71 x 10-16 kg of mass?

AleksAgata [21]

Answer:

6.39 J of energy is needed to generate 0.71 * 10⁻¹⁶ kg mass

Explanation:

According to the Equation: E = mc²

where the mass, m = 0.71 * 10⁻¹⁶ kg

the speed of light, c = 3 * 10⁸ m/s

The amount of energy needed to generate a mass of 0.71 * 10⁻¹⁶ kg is calculated as follows:

E = (0.71 * 10⁻¹⁶) (3 * 10⁸)²

E = 0.71 * 10⁻¹⁶ * 9 * 10¹⁶

E = 0.71 * 9

E = 6.39 J

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3 years ago

500 kg car takes a car of radius 50m with a velocity of 36km/hr.the centripetal force is

mylen [45]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a car weighing 500 kg takes a turn of radius 50m with a velocity of 36 km/hr

To calculate - the centripetal force

Formula used -

$\bold{F = \frac{mv {}^{2} }{r}} \\$

where ,

r = radius

m = mass of the object

v = velocity with which the object moves

According to Question ,

Mass of car = 500 kg

Radius of the round = 50 m

velocity of car = 36 km/hr

$velocity = \cancel{36 }\times \frac{5}{\cancel{18}} \\ \\ \implies \: velocity = 10 \: ms {}^{ - 1}$

Substituting the values in the formula ,

$F = \frac{\cancel{500} \times 10 {}^{2} }{\cancel{50}} \\ \\ \dashrightarrow \: F = 10 \times 10 {}^{2} \\ \\ \dashrightarrow \: F = 1000 \: N$

hope helpful ~

3 0

2 years ago