Our Dynamic Universe Flashcards
What does the S in SUVAT stand for?
Displacement
What does the U in SUVAT stand for?
Intinal velocity
What does the V in SUVAT stand for?
Final velocity
What does the A in SUVAT stand for?
Acceleration
What does the T in SUVAT stand for?
Time
How do you calculate weight down a slope?
Weight-parallel=mgsin0
How do you work out a horizontal component?
Horizontal=resultant×cos0
How do you calculate a vertical component?
Vertical=resultant×sin0
When a lift is Stationary what is the apparent weight equal to?
Actual weight
When a lift is moving at a Stationary speed what is apparent weight equal to?
Actual weight
When a lift is accelerating up what is apparent weight equal to?
Actual weight +fun
When a lift is decelerating down what is apparent weight equal to?
Actual weight + fun
When a lift is decelerating up what is apparent weight equal to?
Actual weight - fun
When a lift is accelerating down its apparent weight is equal to?
Actually weight - fun
What happens to your weight in a lift when the lift is in free fall?
Weightlessness
What is the law of conservation of momentum?
The total momentum before a collision equals the total momentum after a collision in the absence of external forces.
How do you work out if a collion is elastic?
Calculate kinetic energy before and after a collision. If it is equal then the collision is elastic. If it isn’t equal then it is inelastic.
What is impulse equal to?
Change in momentum
Contact force × contact time
Area under a force time graph
Is horizontal velocity constant?
Yes
Is vertical velocity constant?
No
What is the vertical velocity at max height?
Zero
Is the speed of light constant in all frames of reference?
Yes
Name scalar quantity?
Distance Speed Time Mass Energy
Name vector quantities
Displacement Velocity Acceleration Momentum Force
What does a straight line on a displacement time graph indicate?
Constant velocity
What is the gradient of a displacement time graph equal to?
Velocity
What is equal to the area under a velocity time Graph?
Displacement
What is the gradient of a velocity time Graph equal to?
Acceleration
What is newton’s first law?
An object will remain at rest, or will continue to move in a straight line at a constant speed, unless acted upon by an unbalanced force.
What is newton’s second law?
A uniform unbalanced force will produce a uniform acceleration.
What does conservation of energy state?
Energy cannot be created or destroyed, only transformed from one form into another.
Can energy be created?
No
Can energy be destroyed?
No
Can energy be transferred from one from to another?
Yes
What is the law of conservation of linear momentum?
The total momentum before a collision is equal to the total momentum after a collision in the absence of external forces.
What is the total momentum before a collision equal to?
The total momentum after (in the absence of external forces)
What is the total momentum after a collision equal to?
The total momentum before a collision (in the absence of external forces)
What is the area under a force time graph equal to?
Impulse
What is impulse?
Change in momentum
How old is the universe?
13.8 billion years old
