Please help me with this. Finding speed.
2 answers:
The speed is 80 m/h you find it by dividing the distance by time
What you need is a definition of average speed. Here it is: Average speed = (distance covered) / (time to cover the distance) . For the race car in the question: Average speed = (200 mile) / (2.5 hour) = (200 / 2.5) (mile/hour) = 80 miles per hour . That doesn't seem all that fast for a race-car. But the math is bullet-proof.
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I think It would be C. Checking a prediction. Sorry if I’m wrong
We can find the force by using the following formula; N = ma + mg Fa = ma = 76 x 1.2 = 91.2 Fg = mg = 76 x 9.8 = 744.8 N = 91.2 + 744.8 = 836 So, the force is 836 N.
Answer:
Explanation:
If the work done on the cart is NET work
Then the work will result in an increase in kinetic energy
KE₀ + W = KE₁
½mv₀² + W = ½mv₁²
½(0.80)(0.61²) + 0.91 = ½(0.80)v₁²
v₁ = 1.626991...
v₁ = 1.6 m/s
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