3 years ago

Tina walked 300m in 100s and200m in 150s. What was her average speed.

Physics

1 answer:

skelet666 [1.2K]3 years ago

5 0

Answer:

2m/s

Explanation:

Total Distance = 300m+200m = 500m

Total Time = 100s+150s = 250s

Average Speed = Total distance travelled/Total time taken

=500m/250s

=2m/s

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3 years ago

The differential equation below models the temperature of an 88°C cup of coffee in a 24°C room, where it is known that the coffe

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3 years ago

I throw a ball off the edge of a 15.0m cliff. If I threw it horizontally at 8.0 m/s, how much time did it take to fall?

pickupchik [31]

Just ignore the horizontal component

if you have a vertical displacement of 15m, 0ms^1 initial velocity, end velocity is ignored, we know the acceleration due to gravity as 9.81ms^2 so we can work out the time using SUVAT

S=15
U=0
V=?
A=9.81
T=?

S=UT + 0.5 AT^2

UT=0

therefore,

S=0.5AT^2

rearrange to:

T=SQR (2S/A)

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