Q1
It is the flight path of a projectile
TRAJECTORY
It is the amount of energy that an object has due to its motion.
KINETIC ENERGY
What type of engine was first used and studied?
STEAM ENGINE
Who introduced the concept of heat engine and reversibility on thermodynamics? (full name)
Sadi Carnot
What result would be the same with a projectile thrown at 30 ˚ and 60 ˚?
RANGE
It is the quantity of motion of a moving body and measured as a product of its mass and velocity.
MOMENTUM
Any device that converts heat to usable energy, particularly mechanical energy.
HEAT ENGINE
It is a collision in which there is no net loss in kinetic energy in the system as a result of the collision.
ELASTIC COLLISION
A change in momentum
IMPULSE
What is the formula used in solving momentum?
p = mv
Two types of collision?
ELASTIC COLLISION
INELASTIC COLLISION
It is the formula we used to determine how long the projectile lasted once it reached its highest point.
t= v0sinθ /g
What is the symbol for efficiency in thermodynamics?
η (eta)
Formula we used to compute the ideal efficiency of heat engines.
η = ((Th - Tc) / Th) x 100
What is the value of g?
9.8 m/s2
What energy transformation occurs when a person eats food?
Chemical Energy -> Mechanical Energy
What is the formula used in solving the maximum vertical displacement traveled by the projectile in its trajectory.
H or dy = (v0sinθ)2/2g
A 5 kg bowling ball is rolled with a velocity of 10 m/s. What is its momentum?
50 kg m/s
What is the momentum of a 1500 kg car going at highway speed of 28 m/s?
42,000 kg m/s
If an engine extracts heat from a 400 Kelvin reservoir and expels heat at 200 Kelvin reservoir, what is its efficiency?
50 %
A Carnot engine operates using a 527°C energy reservoir and a 27°C energy reservoir. The thermodynamic efficiency of this engine is:
62.5 %
A truck moves at 10 m/s collide a car moves at 20 m/s. After collision, both truck and car move together at the same speed. Mass of truck is 1400 kg and mass of car is 600 kg. What is the velocity of both truck and car after collision.
v = 13 m/s
Find the range if v0 = 25 m/s and θ = 45°
63.77 m
What is the momentum of a 225.0 g soft ball moving at 35.0 m/s?
7.88 kg m/s
A 20-gram bullet moves at 10 m/s in a horizontal direction, collide a 60-gram block rest on a floor. After collision, bullet and block move together with the same speed and the same direction. What is the speed of both bullet and block.
v = 2.5 m/s