1st Semester Review Practice

​ (a)   is the unit we use for force. (It's named after a dead dude).

• Newton
• Celsius

An imbalance of forces will have:

• Acceleration

• Balance

• Contact

Match the following

• Equal and opposite forces - no acceleration happens

• Deceleration

• Force in one direction - acceleration happens

• Imbalanced forces

• Resistance to changing state of movement

• Inertia

• To decrease the rate of speed

• Acceleration

• To increase the rate of speed

• Balanced forces

Draw a vector.

Match the following noncontact forces to their definition.

• Force of attraction between bodies in the universe. It binds galaxies together.

• Gravitational forces

• Requires the presence of a magnetic field

• Magnetic forces

• Binds atoms together to make different elements.

• Nuclear forces

​ (a)   is how much matter something has. ​ (b)   is the force due to gravity.

• Mass
• Weight

Order the following laws of motion from one to three.

• A body at rest will stay at rest. A body in motion stays in motion.

• The acceleration of an object is based off the force acting on it and its mass.

• Every action has an equal and opposite reaction.

Match the following

• An arrow showing which direction a force is moving an object

• Vector

• Energy from heat/temperature

• Thermal energy

• Speed in a certain direction

• Speed

• Energy of motion

• Kinetic Energy

• How fast per unit of time something is moving

• Velocity

The law of conservation of ​ (a)   states that energy cannot be created or destroyed. It can only change forms.

• energy
• kinetics
• matter

Order the wavelengths of the electromagnetic spectrum from shortest to longest.

• X-rays/the color green

• Red/long radio waves

• Gamma rays/ the color violet

• Microwaves/the color orange