Calculating Speed 1
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
The first step to solve this problem is to:
- Figure out what the numbers mean and assign variables to them.
- Write the equation.
- Find the answer.
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
Which of the following is correct?
- ΔD = ?
ΔT = 30 miles
S = 2 hours - ΔD = ?
ΔT = 2 hours
S = 30 miles - ΔD = 30 miles
ΔT = 2 hours
S = ? - ΔD = 30 miles
ΔT = ?
S = 2 hours
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2 is?
- Solve for speed
- Solve for Distance
- Write the formula for speed.
- Write the formula for distance
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2: Formula
The formula you need is:
- a = ΔS/ΔT
- S = ΔT/ΔD
- S = ΔD/ΔT
- S = ΔD(ΔT)
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2: Formula
S = ΔD/ΔT
Step 3 is?
- Give the answer
- Assign variables
- Find the formula
- Put in numbers
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2: Formula
S = ΔD/ΔT
Step 3: Put in numbers
Which of the following is correct?
- 30 mi = ΔD/2 hrs
- S = 30 mi/2 hrs
- S = (30 mi) X (2 hr)
- S = 2 hrs/30 mi
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2: Formula
S = ΔD/ΔT
Step 3: Put in numbers
S = 30 mi/2 hrs
Step 4 is?
- Find the right formula
- Calculate the answer
- Stick in the numbers
- Assign variables
Problem: A car drives 30 miles in 2 hours. Calculate the car's speed.
Step 1: assign variables.
ΔD = 30 miles
ΔT = 2 hours
S = ?
Step 2: Formula
S = ΔD/ΔT
Step 3: Put in numbers
S = 30 mi/2 hrs
Step 4: Calculate the answer
The answer is:
- S = 15 mph
- S = 32 mph
- S = 28 mph
- S = 60 mph