ALL THE FORMULAS IN THIS CHAPTER FORCE AND LAWS OF MOTION CAN ANY ONE SAY ME ASAP
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forceForce = mass x acceleration
example:
A car weighs 1000 kg and is out of fuel and is being pushed at a rate of 0.05 km/s/s to the nearest petrol station.
1000 x 0.05 = 50
Force = 50NGravitational Potential EnergyEp = mass x gravity x height
example:
A 0.5 kg ball is dropped from a height of 9 m.
0.5 x 9.8 x 3 = 14.7
Ep = 14.7JAverage AccelerationAverage Acceleration = final speed - initial speed / time
example:
A car speeds up to 60 km/h from rest in 5 seconds.
60 - 0 / 5 = 12
Average Acceleration = 12 km/h/sKinetic EnergyEk = 1/2 x mass x (speed)2
example:
A car that weighs 1300 kg is moving at the speed of 5 m/s.
1/2 x 1300 x (5)2 = 16250
Ek = 16250JDistanceDistance = average speed x time
example:
Leonardo Da Vinci drove a rock at 6 km/h and drove for 2 hours.
6 x 2 = 12
Distance = 12 kmAverage SpeedAverage Speed = distance traveled / time taken
example:
Niccolo Machiavelli took 2 hours to drive 6 km.
6 / 2 = 3
Average Speed = 3 km/hrAccelerationAcceleration = force / mass
example:
A car weighs 1000 kg and is out of fuel and is being pushed by Raphael with a force of 50N.
50 / 1000 = 0.05
Acceleration = 0.05 km/s/sWork DoneWork Done = force applied x distance
example:
Weight lifter applies force of 784N to lift a barbell 2.1m off the ground.
784 x 2.1 = 1646.4
Work Done = 1646.4JPowerPower = work done / timeEfficiencyEfficiency = useful energy / total energy x 100%
example:
200J is supplied to a Hair dryer but only 80J is used.
80/200 x 100 = 40
Efficiency = 40%Final SpeedFinal Speed = initial speed + average acceleration x time
example:
A train is travelling initially at a speed of 30 km/h at a constant rate of 2 km/h/s for 30 seconds.
30 + (2 x 30) = 90
Final Speed = 90 km/hNewton's first law of motionAn object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
This means that there is a natural tendency of objects to keep on doing what they're doing. In the absence of an unbalanced force, an object in motion will maintain this state of motion.
The TARDIS will keep travelling through space until it's stopped by a inter stellar cruise liner named the Titanic.Newton's second law of motion
example:
A car weighs 1000 kg and is out of fuel and is being pushed at a rate of 0.05 km/s/s to the nearest petrol station.
1000 x 0.05 = 50
Force = 50NGravitational Potential EnergyEp = mass x gravity x height
example:
A 0.5 kg ball is dropped from a height of 9 m.
0.5 x 9.8 x 3 = 14.7
Ep = 14.7JAverage AccelerationAverage Acceleration = final speed - initial speed / time
example:
A car speeds up to 60 km/h from rest in 5 seconds.
60 - 0 / 5 = 12
Average Acceleration = 12 km/h/sKinetic EnergyEk = 1/2 x mass x (speed)2
example:
A car that weighs 1300 kg is moving at the speed of 5 m/s.
1/2 x 1300 x (5)2 = 16250
Ek = 16250JDistanceDistance = average speed x time
example:
Leonardo Da Vinci drove a rock at 6 km/h and drove for 2 hours.
6 x 2 = 12
Distance = 12 kmAverage SpeedAverage Speed = distance traveled / time taken
example:
Niccolo Machiavelli took 2 hours to drive 6 km.
6 / 2 = 3
Average Speed = 3 km/hrAccelerationAcceleration = force / mass
example:
A car weighs 1000 kg and is out of fuel and is being pushed by Raphael with a force of 50N.
50 / 1000 = 0.05
Acceleration = 0.05 km/s/sWork DoneWork Done = force applied x distance
example:
Weight lifter applies force of 784N to lift a barbell 2.1m off the ground.
784 x 2.1 = 1646.4
Work Done = 1646.4JPowerPower = work done / timeEfficiencyEfficiency = useful energy / total energy x 100%
example:
200J is supplied to a Hair dryer but only 80J is used.
80/200 x 100 = 40
Efficiency = 40%Final SpeedFinal Speed = initial speed + average acceleration x time
example:
A train is travelling initially at a speed of 30 km/h at a constant rate of 2 km/h/s for 30 seconds.
30 + (2 x 30) = 90
Final Speed = 90 km/hNewton's first law of motionAn object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
This means that there is a natural tendency of objects to keep on doing what they're doing. In the absence of an unbalanced force, an object in motion will maintain this state of motion.
The TARDIS will keep travelling through space until it's stopped by a inter stellar cruise liner named the Titanic.Newton's second law of motion
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