<span>Examples of outside forces acting on a car is gravity, wind, and other cars. Cars do not slide down hills because their weight, combined with the friction of their tires against the road, hold them in place. </span>
Force, pressure, and charge are all what are called <em>derived units</em>. They come from algebraic combinations of <em>base units</em>, measures of things like length, time, temperature, mass, and current. <em>Speed, </em>for instance, is a derived unit, since it's a combination of length and time in the form [speed] = [length] / [time] (miles per hour, meters per second, etc.)
Force is defined with Newton's equation F = ma, where m is an object's mass and a is its acceleration. It's unit is kg·m/s², which scientists have called a <em>Newton</em>. (Example: They used <em>9 Newtons</em> of force)
Pressure is force applied over an area, defined by the equation P = F/A. We can derive its from Newtons to get a unit of N/m², a unit scientists call the <em>Pascal</em>. (Example: Applying <em>100 Pascals </em>of pressure)
Finally, charge is given by the equation Q = It, where I is the current flowing through an object and t is how long that current flows through. It has a unit of A·s (ampere-seconds), but scientist call this unit a Coulomb. (Example: 20 <em>Coulombs</em> of charge)
The Kinetic Energy Formula is as follows: KE = mass x velocity^2 /2
Plug in the correct numbers into the variables!
KE = 1500 kg x 10 m/s ^2 / 2
Square the 10 m/s!
KE = 1500 kg x 100 m/s / 2
Multiply!
KE = 150,000 / 2
Divide!
KE = 75,000 Newton-meters or Joules!
Answer:
The support force/ Normal reaction force
Explanation:
Refer to Newtons third law.
"The third law states that when a force acts on a body due to another body, then an equal and opposite force acts simultaneously on that body"
Since we have a downward force acting on your object, in this case gravity/weight, there is an equal and opposite force given off by the surface the object is on. This is called the support force or the normal reaction force
Answer:
Explanation:
The work done by the force to stop the ball will decrease the kinetic energy of it. so we can write
W = - ΔK. E
F.d = - (
)
As the final velocity is zero.
F = 
