This document contains information about forces and motion. It defines key terms like force, mass, and acceleration. It presents the formula for calculating acceleration (a=F/m) and uses examples to demonstrate how to apply the formula to calculate net force or acceleration when given other variables. One example calculates the acceleration of a 2kg block being pushed by opposing forces of 20N and 30N. A second example determines the horizontal force needed to accelerate a 1000kg car at 4m/s^2. The document provides context and step-by-step workings for these examples.

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•Pushing a car is easier than pushing a
truck with the same amount of force as
the mass of the car is lesser than the
mass of the truck.
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Explanation:

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•In golf game, acceleration of the golf
ball is directly proportional to the force
with which it is hit by the golf stick.
Also, the force applied is inversely
proportional to the mass of the ball.
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Explanation:

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Formula:

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Formula:
F = ma
m = F / a
a = F / m

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Formula:
Where:
F = force (kg m/s or Newton
or N)
m = mass (kg)
a = acceleration (m/s )
2
2

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Example:
If there is a block of mass 2kg, and a
force of 20 N is acting on it in the
positive x-direction, and a force of 30 N
in the negative x-direction, then what
would be its acceleration?

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Solution:
Given: Unknown:
F1= 20 N Fnet =?
F2 = 30N a = ?
m = 2 kg

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Solution:
To calculate its acceleration, we first
have to calculate the net force acting on
it.
Fnet = 20 N – 30 N = -10 N
FORMULA: a = F/m

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Solution:
a = F / m
= -10kg m/s / 2kg
= -5 m/s
2
2

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Solution:
= -5 m/s
The negative acceleration indicates that the block
is slowing and its acceleration vector is moving
in an opposite direction directed opposite to the
direction of motion.
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Example:
How much horizontal net
force is required to accelerate
a 1000 kg car at 4 m/s2?

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Solution:
Given: Unknown:
m = 1000kg F = ?
a = 4 m/s2

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Solution:
Formula: F = ma
F = ma = (1000kg)(4 m/s2)
= 4000kg m/s2
= 4000 Newtons or 4000 N