PHYSICS HIGH SCHOOL

Greyhounds can accelerate at 7 m/s2 at the start of a race. How much force does it take a 35 kg dog to produce this acceleration

Answers

Answer 1
Answer:
Force = (mass) x (acceleration)              Newton's second law of motion.

Force = (35 kg) x (7 m/s²)  =  245 newtons

                                    (about  55 pounds)

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Answers

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Total discharge head includes?

Answers

The term “total” indicates that it includes the static pressure head (h), the velocity head (hv), and the elevation head (Z).

If a police car drives at a constant speed of 30 km/h, how long will it take to travel a distance of 96 km??

Answers

Answer:

3.2 hours

Explanation:

96÷30=3.2

so it should take 3.2 hours

In the mass-energy equivalence equation, c stands for _________.A. mass
B. energy
C. charge
D. the speed of light

Answers

Correct answer is D.

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What does a reference point provide

Answers

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A rock falls off the edge of a cliff and strikes the ground after 3.8 s. What is the height of the cliff? Assume air resistance is negligible.

Answers

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Use the formula: 
h = vo*t - (1/2)gt^2 

Since the rock experiences freefall, initial velocity (vo) is zero: 
h = -(1/2)gt^2 

Substitute: 
h = -(1/2)(-9.8)(3.8^2) 
h = 70.756
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