Review 1
total kinetic energy of the particles in a substance.
Thermal Energy
What is the equation for potential energy?
PE = mgh
Elastic, inelastic and _____________ are types of collision.
perfectly inelastic
What is the value of acceleration due to gravity?
9.8 m/s2
What is the GPE of the ceiling fan if it is in the height of 8m and has a mass of 1.5 kg?
117.6 J
__________________- is potential energy that an object has due to its mass and its position in a gravitational field.
Gravitational Potential Energy
The mass of the object is 400 kg and has velocity of 15 m/s. What is the momentum of the object?
6000 kg. m/s
This is a collision where the objects couple, there is damage, and heat is generated.
inelastic collision
What is the equation for work?
Work = Force x distance
Calculate the work done by 33 N force pushing a pencil 0.45 m.
14.85 N.m
What is the unit of work?
Joule
Which has more momentum? A large truck moving 50 miles per hour or a small truck moving 50 miles per hour?
The large truck.
This is a collision where there is NO permanent damage done after the collision. Momentum and kinetic energy are conserved.
Elastic collision
How much work is done when a 24 N force moves a block 4 m?
96 J
What is the impulse caused by the average force of 15 newtons if it acts on the ball for 0.8 seconds?
12 N.s
What is the unit of power?
Watts or Hp
The equation for impulse.
Impulse = force x time (I=F*T)
The total momentum of vehicles before a collision is equal to the total momentum after the collision. What law is this?
Law of conservation of momentum
The equation for power.
Power = work/time
Two objects have the same mass and the same material composition. The first object has a temperature of 88 F and the second object has a temperature of 212 F. What is the thermal equilibrium temperature?
150 F
Using microwave is an example of what type of heat transfer?
Radiation
An 5.5-kilogram bowling ball is rolling in a straight line toward you. If its momentum is 3 kg·m/s, how fast is it traveling?
0.54 m/s
A 40,000 kg train moving at 8 m/s collides with a 10,000 kg truck that is stalled on the tracks. What is the velocity of both vehicles after the collision?
6.4 m/s
A 120 kg cart travelling at 2 m/s to the east collides with 600 kg cart that is initially at rest. The two carts stick together and move together after the collision. What is the final velocity of the two carts?
0.33 m/s
A 22 N-Force is exerted to an object in an angle of 30 degrees and moved 1.5 m from the original position. What is the work done to the object?
28.58 N.m