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3 years ago

Please help . Anybody

Physics

1 answer:

Alona [7]3 years ago

6 0

Answer:

1: c

2: a

3: b

sorry if I am wrong

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Suppose a person sits on a skateboard with her feet up and throws a ball. Explain why she will move as a result of throwing the

Snowcat [4.5K]

I’m guessing is because she uses force to throw the ball, allowing the energy to move the person.

sorry if it’s not 100% correct

8 0

3 years ago

The driver of a car traveling 110 km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a comp

Ber [7]

Answer: $-6.80\ ms^{-2}$

Explanation:

We know that the formula for acceleration is given by:

$a=\dfrac{v-u}{t}$ , where v = Final velocity

u= Initial velocity

Given : The driver of a car traveling 110 km/h slams on the brakes so that the car undergoes a constant acceleration.

i.e. u= 110 km/h $=\dfrac{110\times1000}{3600}\approx35.6\ m/s$ [∵ 1 km= 100 meters and 1 hour = 3600 seconds]

v= 0 m/s ( At brake , final velocity becomes 0)

t=4.5 seconds

Substitute all the values in the formula , we get

$a=\dfrac{0-30.56}{4.5}\approx-6.80\ ms^{-2}$

Hence, the average acceleration of the car during braking is $-6.80\ ms^{-2}$ .

5 0

3 years ago

A light bulb and a solenoid are connected in series to a battery. An irod rod is thrust rapidly into the solenoid and later rapi

Ivanshal [37]

Answer:

3) Dims in, Brightens out

Explanation:

The relationship between the inductance of a coil and the current is inverse.

As the rod is thrusted into the solenoid, the inductance increases, which in turn decreases the current and the bulb gets dimmer. This is also because some magnetic force is drawn away from the solenoid and the battery.

When the rod is removed, the inductance of the solenoid decreases, the current increases, and the bulb becomes brighter.

4 0

3 years ago

Read 2 more answers

Two forces whose resultant is 100N,are perpendicular to each other.if one of them makes an angle of 60° with the resultant, calc

DIA [1.3K]

Magnitude of the force = 50N

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<u>Explanation:</u>

Let one force be X

And the second force be Y

Both the forces are perpendicular, so α = 90°

The resultant R of the two forces = 100N

Angle between resultant and 1 force, α = 60°

We know,

R² = X² + Y² + 2XYcos 90

100² = X² + Y²

If X makes an angle of Φ = 60°

Then, tan Ф = Y sin α / X + Y cos α

Putting the values we find,

tan 60 = Y/X

Y = √3X

Putting Y = √3X in equation 1 we get,

(X)² + (√3X)² = 100 X 100

4X² = 100 X 100

X² = 2500

X = 50N

Therefore, magnitude of the force = 50N

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4 years ago

Clouds are formed when water vapor in the atmosphere becomes a liquid and condenses. Condensation is a result of the difference

aleksklad [387]

Answer:

B temperature and dew point temperature

4 0

2 years ago