(Assume there is no friction) A bike starts rolling down a hill at 4.3 m/s . After 12 s it reaches the bottom moving at 11.5 m/s. How long was the hill? Express your answer with the correct number of significant digits.

94.8 m

Explanation:

The motion of the bike is a uniformly accelerated motion (=constant acceleration), so we can use the following suvat equation:

where:

s is the distance covered

u is the initial velocity

v is the final velocity

t is the time elapsed

For the bike in this problem, we have:

u = 4.3 m/s is the initial velocity

v = 11.5 m/s is the final velocity

t = 12 s is the time

Solving for s, we find the length of the hill:

the first, second, and fifth options

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.