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Karten in diesem Stapel (17)
- 1What is momentump=mv where p is in kgms-1
- 2What is the principle of linear momentum(Assuming no external forces act) linear momentum is always conserved. total linear momentum before a collision= total linear momentum after a collision
- 3What is an elastic collision?Where momentum is conserved and kinetic energy is conserved
- 4What is the equation for kinetic energy?E=1/2mv^2
- 5What is an inelastic collision?Kinetic energy before does not equal kinetic energy after. Linear momentum is still conserved however.
- 6What is Newtons second law of motion?F=ma where F is newtons, m is kg and a=ms-1
- 7What is newtons second law of motion in terms of momentum?F= Δ(mv)/ Δt (the rate of change of momentum in kgms-1=resultant force)
- 8What is impulse?When you rearrange newtons second law it can give: FΔt=Δ(mv) - change in momentum in kgms-1
- 9How do you find impulse from a force time graph?Impulse is the area under a force time graph
- 10Energy transferred=WORK DONE
- 11What is an equation fro work done?W=Fs where w=Joules F-Newtons s-Metres
- 12What do you do when the direction of movement of an object is different from the direction of the force acting on it?Find the component of the force that acts in the direction of the movement:
W=FscosX where X =angel
When X=90 no work is done - 13What is power?The rate at which work is done/second
P(W)= ΔW(J)/ΔT(s) - 14What is the watt(hahaha) defined as?The rate of energy transfer = to Js-1
- 15How do you find the work done from a force displacement graph?The area under the graph=work done
- 16Derive an equation of Power using Force and VelocityP=W/t
W=Fs
P=Fs/y
V=s/t
P=Fv - 17P=fv when the force and motion are in different directionsP=FvCosX where X=angle
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