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4 years ago

Which of the following can be a centripetal force?a.

1 answer:

5 0

The answer is D
Friction acts as a centripetal force in the case of a car turning. The friction creates a tangential force allowing the car to turn.
Tension can act as a centripetal force in the case of circles. Such as swinging a mass on a string, the tension force allows it to move in a curved path.
Gravity acts as a centripetal force in the case of satellites. The gravity keeps the satellite within the orbit.

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What is the displacement of the car after 5 hours<br> a. 0 km<br> b. 15 km<br> c. 40 km<br> d. 20 km

iren2701 [21]

0 Km , Displacement is distance from starting point. Not distance of Journey.

3 0

4 years ago

A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down. If the radius of the loop i

Oduvanchick [21]

To solve this problem it is necessary to apply the concepts based on Newton's second law and the Centripetal Force.

That is to say,

$F_c = F_w$

Where,

$F_c =$ Centripetal Force

$F_w =$ Weight Force

Expanding the terms we have to,

$mg = \frac{mv^2}{r}$

$gr = v^2$

$v = \sqrt{gr}$

Where,

r = Radius

g = Gravity

v = Velocity

Replacing with our values we have

$v = \sqrt{(9.8)(11.8)}$

$v = 10.75m/s$

Therefore the minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top is 10.75m/s

5 0

4 years ago

The index of refraction for red light in water is 1.331 and that for blue light is 1.340. If a ray of white light enters the wat

kobusy [5.1K]

Answer:

Angle of refraction for red light is $43.01^{\circ}$

Angle of refraction for blue light is $42.68^{\circ}$

Explanation:

It is given refractive index for red light is $\mu _{red}=1.331$

Refractive index of blue light $\mu _{blue}=1.340$

Angle of incidence $i=65.30^{\circ}$

According to law of refraction $\mu =\frac{sini}{sinr}$

For red light $1.331 =\frac{sin65.30^{\circ}}{sinr}$

$1.331 =\frac{0.908}{sinr}$

$sinr=0.682$

$r=43.01^{\circ}$

Therefore angle of refraction for red light is $43.01^{\circ}$

Similarly for blue light $1.340 =\frac{sin65.30^{\circ}}{sinr}$

$1.340 =\frac{0.908}{sinr}$

$sinr=0.677$

r = $42.68^{\circ}$

Therefore angle of refraction for blue light is $42.68^{\circ}$

6 0

3 years ago

What happens too baking soda when you heat it up?

Fantom [35]

Salutations!

What happens to baking soda when you heat it up!

When you heat up baking soda, it loses carbon dioxide which tends to crest bubbles. This is what makes it quite light and fluffy.

Hope I helped :D

4 0

3 years ago

Wesley pushed a tennis ball down a long driveway in 2.5s. The ball traveled at a constant acceleration of 1.8 m/s2 down the slop

galina1969 [7]

Answer:

14.5m/s

Explanation:you had to divide 2.5s divide that by 1.8

6 0

3 years ago