Midterm Exam 2024 (4th)

During which interval is the object not moving?

• B to C
• C to D
• D to E
• only at point A

According to the graph how fast does the person travel in the first 5 seconds? Speed= distance/time

• 2 m/s
• 10 m/s
• 12.5 m/s
• 1 m/s

What is inertia?

• The resistance of any physical object to any change in its state of motion
• The amount of mass an object has
• A reaction in an object
• No one knows

Which law of motion is also known as the Law of Acceleration?

• 1st law
• 2nd law
• 3rd law
• 4th law

What is the SI unit used to measure force?

• pounds
• grams
• newtons
• kg/ m2

The force of gravity is also known as

• Mass
• Weight
• Distance
• Acceleration

The amount by which a machine multiplies input force is known as the

• work.
• power.
• output force.
• mechanical advantage

What is the form of energy associated with heat?

• thermal energy

• nuclear energy

• kinetic energy

• potential energy

In a heated room, why does the air near the ceiling tend to be warmer than the air near the floor?

• Conduction

• Radiation

• Convection

What is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t
• Q=mc
• Q= ½mv
• m=QC