ACCELLERATION

Question

I need help with the second part of this question.  Please show work so I can see.  Thanks.

 

I.  The fastest land mammal, the cheetah, can accelerate from 0 mi/hr to 70.0 mi/hr in 3.0 seconds. What is the acceleration of the cheetah? Give your answer in units of mph/sec. I got 23.3 for my answer.

 

The Lamborghini Diablo sports car accelerates from 0.0 km/hr to 99.2 km/hr in 4.0 seconds. What is the acceleration of    this car? Give your answer in units of kilometers per hour/sec. 7.

I got 24.8 kph/s as the answer for the above.

 

 

II.   Which has a greater acceleration, the cheetah or the Lamborghini Diablo? (To figure this out, you must remember that there are 1.6 km in one mile) Be sure to show your calculations

Answer 1

Question 1

 

Use the formula to find acceleration:

 

a = v/t

 

where:

a = acceleration

v = velocity

t = time

 

 

Given:

v₁ = 0 km / hr

v₂ = 99.2 km / hr

t = 4 sec

 

so

 

a = (99.2 km/hr) / 4 sec

 

a = 24.8 kph  / sec

 

  
Question 2

 

Find the velocity of both the cheetah and Lamborghini under the same time.  Then compare them.