Answer: 2.541884 meters
Explain:
Formula: s = 0.5 * g * t^2
Time of fall (t) is 0.72 while the gravitational acceleration rate is (9.80665m/s^2).
Answer:
a. -191.7 J
Explanation:
The work done by a force is given by W = Fdcosθ where F = force applied and d = distance moved and θ is the angle between the force and distance moved.
Here, F = frictional force = 14.2 N
d = distance = 13.5 m
and θ = 180° since the direction of the frictional force and distance are opposite.
So, W = Fdcosθ = 14.2 × 13.5cos180° = -191.7 J
Newton's second law of motion describes the relationship
between force, mass, and acceleration.
These days, we usually write it as
Force = (mass) x (acceleration) .