Math Skills
How many significant digits are in the following value?1.003 m/s
4
What does uniform motion look like in a distance-time graph?
A straight line
What is the energy of motion?
Kinetic Energy
Using the right ammount of significant digits, what is the following value?
4.234 x 13
51
If an object takes 45s to travel 3m, what is it's velocity?
0.07 m/s
What is the energy held by an object high above the ground?
Potential gravitationnal energy
To show the allowed precision of a calculation.
If an object is travelling at 5.8 m/s, how long will it take to reach 45 m?
7.8 s
What is the energy conversion of a person eating a cookie and going for a walk?
Potential chemical energy to kinetic energy
What is the following number rounded to 3 signigicant digits?
193730482.9392
1.94 x108
What is the definition of unifor motion?
A moving object that does not change its speed.
What is the most common for of energy when it is lost during an enery conversion
Thermal energy
(due to friction)
Using the correct number of significant digits, what is the answer to the following division?
1.24 x105 / 24.95 x103
4.97
An object travels 32.5 cm in 2.45 minutes. What is it's velocity in m/s?
0.00221 m/s
If a machine uses 560 J of potential chemical energy and only gains 100 J of useful energy, what is its efficiency?
17.9 %