<h2><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u>:-</h2>
What is Newton's second law of motion?
<h2><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u>:-</h2>
Newton's second law of motion states that the rate of change of momentum is directly proportional to the applied force and the direction of change of momentum takes place towards direction of applied force.
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What do you come to know from Newton's second law of motion?</h3>
1. Concept of Momentum.
2. Measurement of Force.
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Metals
3/4 of the periodic table
Good conductors of heat and electricity
Malleable
Nonmetals
1/4 of the periodic table
Bad conductors of heat and electricity
Not bendable
Answer: -5200 newtons
Your teacher may want you to type in just the positive version of this number.
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Explanation:
We have these given values
- Vi = initial velocity = 28 m/s
- Vf = final velocity = 0, since we want the car to stop
- t = change in time = 10.5 seconds
The acceleration that occurs is....
a = (Vf - Vi)/t
a = (0 - 28)/10.5
a = -28/10.5
a = -2.66666666666667
This acceleration is approximate. The units for the acceleration are in m/s^2.
We'll use this acceleration value in Newton's Second Law equation
Force = (mass)*(acceleration)
F = m*a
F = (1950 kg)*(-2.66666666666667 m/s^2)
F = (1950*(-2.66666666666667)) kg m/s^2
F = -5200 newtons
The negative force value is to indicate the force is working against the car's original direction of motion. For instance, if the car is driving to the right, then a force to the left is applied as the braking force to slow the car down. It might be helpful to draw out the free body diagram.
Newton's third law: for every action there is an equal and opposite reaction. Here is an example : If object A pushes on B, then object B pushes on A just as hard but in the opposite direction, always. Here is another one : <span>suppose the tires of roller Coaster push against the track while the track pushes back on the tires—the tires and road simultaneously push against each other.Thus the reactive force of track pushes the Coaster ahead.
Hope it helped</span>