DYNAMICS
This causes an object to change its motion, such as starting to move, stopping, speeding up, slowing down, or changing direction.
Force
A device or tool that helps make work easier by applying, changing, or redirecting force.
Machine
The power of an object to move.
Kinetic energy
It tells us how hot or cold something is.
Temperature
These are substances that can flow, such as liquids and gases (air is a fluid too).
Fluids
Give an 1 example of balance and unbalance forces.
Their answer may vary.
What are the 6 types of simple machines
Lever
Wheel and Axle
Pulley
Ramp
Wedge
Screw
Three examples of renewable energy
Explain how temperature affect the movement of particles.
The ability of objects to float.
Buoyancy
A force that opposes motion when objects touch or move through fluids (like air or water).
Friction
A knife is an example of what type of simple machines
Wedge
How does energy change from one form to another?
Through a process called energy transformation (or conversion), often initiated by physical actions or chemical reactions.
A scientist measures the temperature of a solution as 310 K. What is this in Celsius?
36.85 C
4 main properties of Gas
A 20 kg box sits on a frictionless surface. You push the box with a horizontal force of 60 N to the right. What is the acceleration of the box?
60 N/ 20 kg = 3 m/s2
How do simple machines work?
Other answer may vary
A 2.0 kg book is placed on a shelf that is 1.5 m above the floor. How much gravitational potential energy does the book have?
29.4J
Explain how heat moves.
Conduction (direct contact)
Convection (movement of fluids)
Radiation (energy waves through space)
A gas has a volume of 4 L at a pressure of 100 kPa. What will be the volume if the pressure increases to 300 kPa, with temperature constant?
1.33 L
EXPLAIN THE THREE LAWS OF MOTION
1ST- An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced external force.
2ND-The acceleration of an object depends on its mass and the amount of force applied
3RD- For every action, there is an equal and opposite reaction.
Explain how compound machine works in Scissors.
Scissors act as a compound machine by combining two types of simple machines—levers and wedges—to cut materials efficiently
A truck of mass 4,000 kg moves at 12 m/s. Calculate its kinetic energy.
288,000J
Explain the laws of Thermodynamcs
First Law: Energy is conserved.
Second Law: Entropy increases.
Third Law: Entropy approaches zero at absolute zero.
A person with a mass of 60 kg is standing still.
The total area of the bottoms of their shoes touching the floor is 0.03 m².
What pressure do they exert on the floor?
F=mg
F=(60)(9.8)=588 N
P= 588N/0.03 m²
P= 19,600Pa