Word problem review: Basic physics problems
Which units are each of the following measured in typically?:

Acceleration:

Force:

Work:

Power:

What units must the mass be measured in to calculate force?
 

What units must the acceleration be measured in to calculate force?
 

What units must the distance be measured in to calculate work?
 

What units must the time be measured in to calculate power?
 

Word problems:

What is the average velocity of a car that traveled 900 km in 23 hours of driving?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Plug the numbers into the formula and solve for the unknown variable.
 

How long did it take a person skiing at 2.5 m/s to move 450 meters down a hill?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Rearrange it for the unknown variable.

Plug the numbers into the formula and solve for the unknown variable.
 

What is the momentum of a 10 kg shotput thrown at 1.7 m/s?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Plug the numbers into the formula and solve for the unknown variable.
 

What is the acceleration of a boy on a skateboard if the force of propulsion is 15 N if his mass is 58 kg?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Rearrange it for the unknown variable.

Plug the numbers into the formula and solve for the unknown variable.
 

If a 150 kg motorcycle is accelerating at 4.2 m/s2 for 30 meters, how much work is done?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Plug the numbers into the formula and solve for the unknown variable.
 

How long would it take for generator doing 65 megaJoules of work to produce 10,000 MW of power?
What variable are you solving for (i.e., what is the ‘unknown’ variable)?

What units will your answer be in (based on the units in the word problem)?

Which formula are you going to use?

Rearrange it for the unknown variable.

Plug the numbers into the formula and solve for the unknown variable.


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