What is the speed of a rocket that travels 9000 meters in 12.12 seconds?
742.6 m/s
100
A 2-kg mass is held 4cm above the ground. What is the approximate potential energy of the mass with respect to the ground?
80J
100
Law of Heat Transfer
Hot to Cold
100
momentum
"inertia in motion" Mass x Velocity
200
Velocity
Distance/Time(include direction)
200
How many Seconds will it take for a satelite to travel 450km at a rate of 120m/s?
3,750s
200
Exert 100J in 50s and your power output is
2W
200
Newtons First Law
Law of Inertia. A body in motion stays in motion, a body at rest stays at rest.
200
Impulse
Change in Momentum
300
(Final Velocity-Initial Velocity)/Time
Acceleration
300
In 0.5 seconds, a projectile goes from 0 to 300 m/s. What is the acceleration of the projectile?
600m/s^2
300
A clerk can lift containers a vertical distance of 1m or can roll them up a 2m long ramp to the same elevation. With the ramp, the applied force required is about?
Half as much
300
Newtons Second Law
Force=Mass x Acceleration
300
Conserved
When a physical quantity remains unchanged during a process.
400
Kinetic Energy
1/2mv^2
400
A meteoroid changed velocity from 1.0 km/s o 1.8 km/s in 0.03 seconds. WHat is the acceleration of the meteoroid?
26.6 m/s^2
400
If an astronaut whose total mass is 100kg ejects 0.1kg of gas at the speed of 50m/s from her propulsion pistol, her recoil speed is
0.05m/s
400
Newtons 3rd law
For every action there is an equal but opposite reaction.
400
Inelastic collision
Whenever colliding objects become tangled or coupled together.
500
Potential Energy
wh=mgh
500
The space shuttle releases a space telescope telescope into orbit around the earth. The telescope goes from being stationary to traveling at the speed of 1700 m/s in 25 seconds. What is the acceleration of the satellite?
68 m/s^2
500
A 5-kg fish is swimming at a speed of 1m/s swallows an absent minded 1-kg fish at rest. The speed of the larger fish after lunch is
5/6m/s
500
Conservation Law
Energy cannot be created or destroyed, it can only be transferred.
500
Elastic Collision
When objects collide without being permanently deformed and without generating heat.