A flea jumps by exerting a force of 1.20 × 10−5 N straight down on the ground. A breezeblowing on the flea parallel to the ground exerts a force of 0.500 × 10−6 N on the flea whilethe flea is still in contact with the ground. Find the direction and magnitude of theacceleration of the flea if its mass is 6.00 × 10−7 kg . Do not neglect the gravitational force.

Acceleration a=10.234 m/s²

Direction α=85.3°

Explanation:

Given data

F₁=1.20×10⁻⁵N

F₂=0.500×10⁻⁶N

mass m=6.00×10⁻⁷kg

According to Newton second law.

Fnet=∑F

Substitute the given values

So the magnitude of acceleration is given by

For the direction is given by:

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form