A car advertisement claims that a certain car can accelerate from rest to 70 km/ hr in 7 Seconds(convert to hours first) find the car's acceleration.

Question

I need help figuring out how to convert it to hours first to then solve it.

Answer 1

70 km / hr = 70000 m / 3600 s = 19.44 m/s

 

 

Use the formula:

 

a = (v_F - v_i) / t

 

where:

a = acceleration

v_F =  final speed = 19.44 m/s

v_i = initial speed = 0 m/s

t = time = 7 s

 

Solve for a.   Units for acceleration should be m/s².