Calculating Speed Notes
Calculating Speed Notes
Formula:
Speed = distance
Time
Units:
Distance= kilometer (km), meters (m), centimeter (cm)
Time = seconds (s)
Speed = meters/second or centimeter/second
Practice:
Solving for Speed:
1. What is the speed of a sailboat that is traveling 100 meters in 120 seconds?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator.
2. If a cyclist in the Tour de France traveled southwest a distance of 12,250 meters in one
hour, what would the speed of the cyclist be?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
Solving for Distance:
Still use the same formula of speed = distance/ time but we can rearrange it to
distance = speed x time
1. What is the distance traveled by a police car that moves at a constant speed of 0.5km/sec for 300 seconds?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
2. What distance would be covered in 600 seconds by a train that travels at a constant speed of 3000 meters every 60 seconds?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator.
Solving for Time:
Still use the same formula of speed = distance/ time but we can rearrange it to
Time = distance/speed
1. Sounds travels 330 m/s. If a lightening bolt strikes the ground 1 km away from
you, how long will it take for you to hear it?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
3. How much time will it take for a bug to travel 5 meters across the floor if it is
traveling at 1 m/s?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
Calculating Velocity:
** Remember that speed and velocity are the same thing EXCEPT that velocity
has a direction given
Formula:
velocity = distance/ time
Units:
km/s, m/s, cm/s + a direction such as northeast (NE) or southwest (SW)
Practice:
1. Calculate the velocity of a car that travels 556 kilometers northeast in
12240 seconds.
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
2. If a projectile flies north 387 meters in 5.8 seconds, what is its velocity?
Step 1: Write down the equation you need to solve the problem.
Step 2: Place the known information into the equation.
Step 3: Solve. Carefully enter the numbers into your calculator
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