Force Calculations Practice

Force Calculations Practice

Calculating Force

• Calculate Speed in Meters per Second

• Calculate Acceleration Meters per Second per Second

• Calculate Force in Newtons

Calculating Speed

• Speed = Distance/Time

• Distance = Speed * Time

• Time = Distance/Speed

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Mr. Beckwith ran 50 meters in 40 seconds. What was has speed in m/s?

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Mr. Ayala drove his Tesla at a speed of 130 km/h. How many meters did he travel in 1 second? (round to the nearest hundredth)

Calculating Acceleration

• Acceleration = Change in Speed/Change in Time

• Change in Speed = Acceleration * Change in Time

• Change in Time = Change in Speed/Acceleration

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Mr. Lee is sitting at a stop light and he is running late. When the light turns green, he has 5 seconds to go 80 meters before the next light turns red. What must his minimum acceleration be to make the next light?

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Mrs. Steen is running early to work and notices the light she is approaching has just turned red. Her current speed is 18 meters per second. What will her acceleration be if she needs to stop in the next 3 seconds?

Calculating Force

• Force = Mass * Acceleration

• Mass = Force / Acceleration

• Acceleration = Force / Mass

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A parked car begins rolling down a hill in neutral. The car has a mass of 1200 kg. It is moving at a speed of 10 meters per second after 5 seconds of rolling down the hill. What is the force of the car?

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Three 7th graders wanted to have a scooter race in the gym.  They each got one of their friends to push them.  The first 7th grader had a mass of 60 kg and his friend pushed him with a force of 300 N.  The second 7th grader had a mass of 55 kg and his friend pushed him with a force of 250 N.  The third 7th grader had a mass of 50 kg and his friend pushed him with a force of 200 N.  What was the fastest acceleration in meters/second/second between the three?