A car of mass 800kg moves from rest on a horizontal track and travels 60m...
PHYSICS
WAEC 2007
A car of mass 800kg moves from rest on a horizontal track and travels 60m in 20s with uniform acceleration. Assuming there were no frictional forces, calculate the accelerating force
- A. 240.0N
- B. 800.0N
- C. 1600.00N
- D. 2400.0N
Correct Answer: A. 240.0N
Explanation
S = at + \(\frac{1}{2} at^2\)
60 = 0 x 20 + \(\frac{1}{2}\) x a x 20
a = \(\frac{3}{10}\)m/s2
F = ma = 800 x \(\frac{3}{10} = 240N\)
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *