FORCES AND MOTION MODULE
Explore the three laws of motion, inertia and force to gain a better understanding of how things work.This easy-to-use module helps you understand how different forces interact with each other and how they affect the motion of objects. Take your physics knowledge to a new level with Forces and Motion learning amterial
Explore the three laws of motion, inertia and force to gain a better understanding of how things work.This easy-to-use module helps you understand how different forces interact with each other and how they affect the motion of objects. Take your physics knowledge to a new level with Forces and Motion learning amterial
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This means:
• Objects with lighter mass will accelerate more than the heavier mass.
• More force moving an object, the more the object will accelerate.
• If force is increased, acceleration increases.
• If mass is increased, acceleration decreases.
CALCULATING SECOND LAW OF MOTION
Newton’s second law is best described with a mathematical equation that relates
three variables, force, acceleration and mass to one another. The equation can be stated in
three forms:
F = m x a m = F / a a = F / m
Mass is defined as the quantitative measure of inertia, a fundamental property of all
matter. Acceleration on the other hand, is the rate of change of the velocity of an
object with respect to time. The unit of force is Newton (N); mass is kilogram (kg);
acceleration is meter per second squared (m/s 2 )
Example #1: A 2 kg object accelerated at a constant speed of 5 m/s 2 . How much force is
needed to accelerate the object?
Given: 2 kg, 5 m/ s2
Required: Force
Equation: F = m x a
Solution: F = 2kg x 5 m/s 2
Answer: F = 10 kg/m/s 2 or 10 N
Conversion
1
kg
m/s 2 = N
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