Statistics for AQA - A Level Physics - Mechanics and Materials #2

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Answer Stats

Hint	Answer	% Correct
Give Newton's 1st Law of motion	An object will remain at rest of move at a constant velocity unless acted upon by a resultant force	0%
Momentum changes when	A resultant force is acting	0%
What is the law of conservation of energy	Energy cannot be created or destroyed, ony transferred between objects and transformed between types	0%
Define power	Energy transferred per second	0%
Force × time	Equal to change in momentum	0%
Resultant force is equal to...(think N's 2nd Law)	Equal to the rate of change of momentum	0%
Give the equation for Work done	Force × displacement in the direction of the force	0%
Give the equation for Impulse	Force × time	0%
For a vehicle travelling uphill at constant speed, Work done by driving force =	Gain in gravitational potential energy + work done by friction	0%
Change in gravitational potential energy is equal to the change in kinetic energy is TRUE providing....	If no resistive forces are acting	0%
What is shown by the Area under a force time graph	Impulse	0%
In an Elastic Collision....	kinetic energy is conserved	0%
In an Inelastic collision	kinetic energy is not conserved	0%
Give the equation for Momentum	Mass × velocity	0%
Units equivalent to kgms⁻¹	Ns	0%
For an object travelling at constant velocity under a driving force	Power = Force × velocity	0%
What is shown by the Gradient of a momentum-time graph	Resultant force	0%
Give Newton's 2nd Law of motion	Resultant force is equal to rate of change of momentum	0%
Why does the acceleration of a rocket gradually increases during lift off	Since the mass gradually decreases whilst the force is typically constant	0%
What is the same for two unequal masses hanging over a pulley	The tension acting	0%
Conservation of momentum	The total momentum in a system is constant provided no external force acts	0%
Define resultant force	The vector sum of forces acting on an object	0%
Effect of friction on a moving object	Transfers kinetic energy primarily to thermal energy	0%
Give the equation for Efficiency	Useful energy out ÷ Total energy in	0%
Unit equivalent to Js⁻¹	Watts	0%
Give Newton's 3rd Law of motion	When two objects interact they exert forces on each other that are equal in magnitude, opposite in direction, are of the same type and act along the same line.	0%
Energy transferred is equivalent to	Work done	0%
On a force-distance graph the area under the line represent	work done	0%
For an object sliding downhill at constant speed, Gravitational potential energy lost =	work done by friction	0%