Answer:
According to Newton's first law of motion, an object maintains its state unless a force acts on it. Therefore, a moving car does not change its direction and keeps its speed unless a force acts on it.
Answer: northwest slightly
Explanation: i boat is have
Answer:
4
Explanation:
Given parameters:
Force input = 30N
Force output = 120N
Unknown:
Mechanical advantage of the lever = ?
Solution:
The mechanical advantage is the quantity that describes how much a simple machine is able to multiply force.
This is expressed as:
Mechanical advantage = Force output / Force input
Mechanical advantage = = 4
<span>Force = 10 N; Mass = 2 kg; Coefficient of kinetic friction = 0.20; Distance s = 10 m
Force m x g = 2 x 9.8 = 19.6
Multiplying force with Coefficient of friction that gives force required = 19.6 x 0.2 = 3.92 N
Resultant force = 10 - 3.92 = 6.08
Acceleration a = F / m = 6.08 / 2 = 3.04
We have equation v^2=u^2+2as
initial velocity will be 0 thatis u^2 = 0, so v^2 = 2as = 2 x 3.04 x 10 = 60.8
Final Kinetic energy KEf = 1/2 x m x v^2 = 1/2 x 2 x 60.8 = 60.8 J
Initial Kinetic energy KEi = 1/2 x m x u^2 = 1/2 x 2 x 0 = 0
So change in kinetic energy = 60.8 J</span>
Candles, light bulbs (in torches, around the house), televisions, fireworks. Remember: All objects that give out their own light are called luminous So the sun is luminous, it is a natural light source. stars and meteors also emit light.