Show:
Mechanical Equilibrium
Motion
Projectile Motion
Energy
Momentum
100
what is needed to change an object's state of motion
What is a force
100
average speed is calculated by ?
What is total distance/time
100
the rule used to find the resultant of two component vectors.
parallelogram rule
100
The equation for calculating Work.
What is force x distance.
100
collision where a car crumples on impact
What is inelastic
200
acceleration is ?
What is change in speed/time interval
200
what geometric theorem is used to solve the addition of perpendicular vectors
What is Pythagorean theorem
200
When work is done on an object is gains this.
What is mechanical energy?
200
why does a cannon recoil when fired
What is momentum is conserved, so the momentum the cannon is equal and opposite of the cannonball
300
stretching force associated with springs and pulleys
What is tension
300
slows the motion of falling objects
What is air resistance
300
downward motion of a projectile is the same as _______
What is free fall
300
The 2 types of mechanical energy.
What are Potential energy and Kenetic energy.
300
which crash is more survivable and why? car hits tree car hits bridge abutment with 10 barrels of sand in front
What is bridge abutment with sand barrels because the sand decreases the momentum to zero over a longer period of time
400
for equilibrium to occur, the sum of all forces must equal
What is zero
400
another name for deceleration
What is negative acceleration
400
when bowling, is the bowling ball a projectile and why or why not.
What is no, it has no vertical motion only horizontal motion.
400
The equation for the law of conservation of energy.
What is PE1 + KE1 = PE2 + PE2
400
which boxing gloves hit harder & why 6 oz gloves 16 oz gloves
What is 6 oz gloves because more padding allows momentum to be reduced to zero over a longer time.
500
upward force that balances a weight on a surface
What is support or normal force
500
instantaneous speed of a protile = ? x time
What is "g" or approx. 10
500
What is an projectile called when it continually 'falls' around the Earth?
What is a satellite.
500
The units for work and energy.
What are Joules.
500
what happens when 10 astronauts in a circle in space throw balls at each other
What is the circle widens