Mechanics- Energy and Work
A constant force acts on a mass of 8 kg. The initial velocity of the mass is 4 ms-1. After it has travelled a distance of 5 m its velocity is 7 ms-1.
What is the force in newtons?
What is the force in newtons?
Original post by tattyvicks
A constant force acts on a mass of 8 kg. The initial velocity of the mass is 4 ms-1. After it has travelled a distance of 5 m its velocity is 7 ms-1.
What is the force in newtons?
What is the force in newtons?
Work done by force = increase in KE. Work done by force = force x distance
Original post by tattyvicks
A constant force acts on a mass of 8 kg. The initial velocity of the mass is 4 ms-1. After it has travelled a distance of 5 m its velocity is 7 ms-1.
What is the force in newtons?
What is the force in newtons?
as an alternative method, constant force => constant acceleration. You can do SUVAT because you know u, v and s, and then you can use F = ma to derive the force.
thanks all...got my answer as 26.4N which is correct
i have a few other questions that i am stuck on though:
A mass is attached to the lower end of a vertical light inelastic string. The mass is given a horizontal velocity of 5 ms-1.
What is the greatest height of the mass?
and...
A mass of 5 kg is projected up a smooth slope of 30º with a speed of 6 ms-1.
How far up the slope does the mass travel?
i have a few other questions that i am stuck on though:
A mass is attached to the lower end of a vertical light inelastic string. The mass is given a horizontal velocity of 5 ms-1.
What is the greatest height of the mass?
and...
A mass of 5 kg is projected up a smooth slope of 30º with a speed of 6 ms-1.
How far up the slope does the mass travel?
Original post by tattyvicks
thanks all...got my answer as 26.4N which is correct
i have a few other questions that i am stuck on though:
A mass is attached to the lower end of a vertical light inelastic string. The mass is given a horizontal velocity of 5 ms-1.
What is the greatest height of the mass?
and...
A mass of 5 kg is projected up a smooth slope of 30º with a speed of 6 ms-1.
How far up the slope does the mass travel?
i have a few other questions that i am stuck on though:
A mass is attached to the lower end of a vertical light inelastic string. The mass is given a horizontal velocity of 5 ms-1.
What is the greatest height of the mass?
and...
A mass of 5 kg is projected up a smooth slope of 30º with a speed of 6 ms-1.
How far up the slope does the mass travel?
Dont worry all sorted now
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