Let consider few
examples:
● ‘Inertial force’ the force required get things moving, change
direction stop, like the motor car discussed above.
A force may cause stationary object move bring moving body to
rest.
Force
Definition
Force The presence force can only
be detected its effect body.
Therefore, apple weighing 1kg will exert force 9.81m/s2
.
Average velocity m/s m/s m/s
Average acceleration
Velocity
Time
m/s
20
4
5 2
Thus, the average acceleration 5m/s2
.
● ‘Friction force’ the force which resists prevents the movement
of two surfaces contact. The
apple fell from the tree Isaac Newton’s head result gravitational
force.
.
● ‘Tensile force’ the force pulling things apart. Gravitational force causes objects fall the ground.81 m/s2
490.Thestandardrateofaccelerationduetogravityisacceptedas9.
● ‘Compressive force’ the force pushing things together. For example, number people pushing broken-down motor
car exert force which propels forward, but applying the motor car
brakes applies force the brake drums which slows down stops
the vehicle.
Example
A 50kg bag cement falls from forklift truck while being lifted storage shelf. Determine
the force with which the bag will strike the ground:
Force Mass Acceleration (N)
Force 50kg 9.Basic Electrical Installation Work
86
Acceleration
Velocity
Time
(m/s 2
Example
If aircraft accelerates from velocity 15m/s m/s 4s, calculate its average
acceleration.
The presence force can only detected its effect body.81N since
Force Mass Acceleration (N)
The unit force the newton, symbol commemorate the great
English scientist Sir Isaac Newton (1642–1727).5N
A force can manifest itself many different ways.
A force may cause stationary object
to move bring moving body to
rest.
● ‘Cohesive adhesive force’ the force required hold things
together
