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Fantom [35]
2 years ago
14

Stella is driving down a steep hill. She should keep her car __________ to help _________. a. light, it speed up in a higher b.

gear, slow her vehicle in a lower c. gear, slow her vehicle in a lower d. gear, speed up her vehicle
Physics
2 answers:
zvonat [6]2 years ago
6 0

Answer:

b. gear, slow her vehicle in a lower

c.

Explanation:

When driving downhill, use a lower gear so as to increase the effect of engine braking and reduce the risk of overheating the brakes.

By using a low gear while driving, the engine should rev higher than usual as this is part of the engine braking system.

It helps tackle steep drops because applying too much pressure on your car's brakes could cause them to fail.

frez [133]2 years ago
3 0

Answer:

<em>The Answer is both B and C, </em><em>since it has same options from the question given. Gear, slow her vehicle in a lower</em>

Explanation:

<em>The use of a lower gear in a vehicle helps a person to control their speed limits, when approaching a hill. it also saves the brakes too, using the brakes down a hill can overheat the gear and causes brake failures</em>

<em>By changing in into a lower gear and also letting the engine to do the brake work in a vehicle, the engine will absorb a force and slow the vehicle down, but in most cases brakes can be applied but with lesser pressure.</em>

<em>In this case Stella need to slow down by applying her lower gear down a hill to avoid accidents on the road, by controlling her speed limits and  for safety precaution</em>

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Divide the force given by mass and you will find the acceleration of the object :-

F = m × a

3.63 = 18.15 × a

3.63 = 18.15a

a = 3.63/18.15

a = 0.2 m/s^2

hope it helps!

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Janice is unsure about her future career path. She has grown up on her family farm, but she is also interested in medicine. Jani
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An adult elephant has a mass of about 5.0 tons. An adult elephant shrew has a mass of about 50 grams. How far r from the center
Diano4ka-milaya [45]

Answer:

2023857702.507m

Explanation:

f=\frac{GMm}{r^{2} }

recall from newton's law of gravitation

G=gravitational constant

mshew=50g

melephant=5*10^3kg

rearth=radius of the earth 6400km or 6400000m

mearth= masss of the earth

Gm(shrew)m(earth)/r(earth)^2 = Gm(elephant)m(earth)/r^2

strike out the left hand side and right hand side variables

m(shrew)/r(earth)^2 = m(elephant)/r^2

r^2 = m(elephant).r(earth)^2 / m(shrew)       .........make r^2 the subject of the equation

r^2=(5*10^{3} *(6400000)^{2} )/.05

r^2=40960000000000

r=2023857702.507m

4 0
2 years ago
The muzzle velocity of a gun is the velocity of the bullet when it leaves the barrel. The muzzle velocity of one rifle with a sh
Anvisha [2.4K]

Answer:small barrel gun

Explanation:

Given

Muzzle velocity of bullet is greater in short barrel gun as compared to larger barrel gun

acceleration is given by change in velocity with respect to time

a=\dfrac{\Delta v}{\Delta t}

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7 0
1 year ago
Learning goal: to practice problem-solving strategy 6.1 work and kinetic energy. your cat "ms." (mass 8.50 kg ) is trying to mak
ivann1987 [24]
Refer to the diagram shown below.

m = 8.5 kg, the mass of the cat
F = 41.0 N, the force acting up the incline on the cat
θ = 19°, the inclination of the ramp to the horizontal
u = 1.9 m/s, the initial speed along the ramp of the cat
s = 2 m, the length of the ramp
g = 9.8 m/s²
Friction is negligible.

The force F is the component of the cat's weight along the ramp.
F = mg sinθ 
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The net force pushing the cat up the ramp is
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If the acceleration of the cat up the ramp is a, then
(8.5 kg)*(a m/s²) = 13.88 N
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Let v =  the velocity at the top of the ramp.
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Answer: 3.185 m/s

3 0
2 years ago
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