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ki77a [65]
3 years ago
6

A car travels at 40 mph. what distance will it travel in 3 hours?​

Physics
2 answers:
lukranit [14]3 years ago
8 0

Car speed = 40m/ hour

3 hours = 40 × 3 = 120m /hour

Margarita [4]3 years ago
7 0

Answer:

120

Explanation:

if the car travels 40 in one hour , to find the speed in 3 hours multiply 40 x 3 which will give us 120

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Yes, because you would need friction to slow down the rollercoaster to a stop. 
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4 years ago
A parachute falling to the ground.<br><br>​
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Answer:

a parachute falling to the ground is uniform

7 0
2 years ago
A 15.0 kg turntable with a radius of 25 cm is covered with a uniform layer of dry ice that has a mass of 9.0 kg. The angular spe
liubo4ka [24]

Answer:

 ω₂=1.20

Explanation:

Given that

mass of the turn table ,M= 15 kg

mass of the ice ,m= 9 kg

radius ,r= 25 cm

Initial angular speed ,ω₁ = 0.75 rad/s

Initial mass moment of inertia

I_1=\dfrac{M+m}{2}r^2

I_1=\dfrac{15+9}{2}\times 0.25^2\ kg.m^2

I_1=0.75\ kg.m^2

Final mass moment of inertia

I_2=\dfrac{M}{2}r^2

I_2=\dfrac{15}{2}\times 0.25^2\ kg.m^2

I_2=0.468\ kg.m^2

Lets take final speed of the turn table after ice evaporated =ω₂ rad/s

Now by conservation angular momentum

I₁ ω₁ =ω₂ I₂

\omega_2=\dfrac{0.75\times 0.75}{0.468}\ rad/s

ω₂=1.20

7 0
3 years ago
An object has traveled 20 meters in 40 seconds what is its average speed
Mice21 [21]

Hello,


To solve we need to know the formula for speed

The formula is D/T=S     (Distance of time=speed)

Now all we have to do is plug in the numbers.

20/40= 1/2 or 0.5

SO the speed is 0.5 m/s


Have a great day!

6 0
3 years ago
One problem when using rigid metal conduit in a residence is that the installation of the conduit may a weaken the structure b r
worty [1.4K]
The correct answer is A. Installation of rigid metal conduit requires grounding and the grounding equipment used may weaken the structure.
8 0
3 years ago
Read 2 more answers
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