1. What is the average speed, in m/s, of a car that covers 8 km in 12 minutes?
Given: dT = _______
tT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
2. A car travel with an average speed of 60 km/h. How far would it travel if it moves at this rate for 5 hours?
Given: save = _______
tT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
3. A man walks 5 km east in 2 hours, then 2 km east in 1 hour, and finally 3 km in 1.5 hour in the same direction. What is his (a) average speed and (b) average velocity for the whole journey?
Given: dT = _______
tT = _______
dR = _______
Unknown: a. _______ b. ______
Equation: _________ Equation: _________
Substitution: _________ Substitution: __________
Final Answer: _________ Final Answer: __________
4. How long would it take a car to travel 400 km if it has an average speed of 45 km/h?
Given: save = _______
dT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
5. A physics teacher walks 3 km east in 1 hour and then 2 km in 0.5 hour in the same direction. What is the teacher’s average speed and average velocity for the whole trip?
Given: dT = _______
tT = _______
dR = _______
Unknown: a. _______ b. _______
Equation: _________ Equation: _________
Substitution: _________ Substitution: __________
Final Answer: _________ Final Answer: __________
Given: dT = _______
tT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
2. A car travel with an average speed of 60 km/h. How far would it travel if it moves at this rate for 5 hours?
Given: save = _______
tT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
3. A man walks 5 km east in 2 hours, then 2 km east in 1 hour, and finally 3 km in 1.5 hour in the same direction. What is his (a) average speed and (b) average velocity for the whole journey?
Given: dT = _______
tT = _______
dR = _______
Unknown: a. _______ b. ______
Equation: _________ Equation: _________
Substitution: _________ Substitution: __________
Final Answer: _________ Final Answer: __________
4. How long would it take a car to travel 400 km if it has an average speed of 45 km/h?
Given: save = _______
dT = _______
Unknown: _______
Equation: _________
Substitution: _________
Final Answer: _________
5. A physics teacher walks 3 km east in 1 hour and then 2 km in 0.5 hour in the same direction. What is the teacher’s average speed and average velocity for the whole trip?
Given: dT = _______
tT = _______
dR = _______
Unknown: a. _______ b. _______
Equation: _________ Equation: _________
Substitution: _________ Substitution: __________
Final Answer: _________ Final Answer: __________
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Answer:
From the answer for the following,
1. The average speed of the car (in m/s) is 11.11 m/s.
2. The distance travelled by the car is 300 km.
3.a. His average speed for the whole journey is 2.22 km/h.
3.b. His average velocity for the whole journey is 2.22 km/h.
4. The time its take a car to travel is 8.889 hrs .
5.a. The teacher’s average speed for the whole trip is 3.33 km/h.
5.b. The teacher’s average velocity for the whole trip is 3.33 km/h.
Step-by-step explanation:
Item 1:
Given:
d=8 km=8,000 m
t=12 min=720 s
Unknown:
s= ?
Equation:
s=d/t
Substitution:
s=(8000 m)/(720 s)=11.11 m/s
Answer:
11.11 m/s
Item 2:
Given:
s=60 km/h
t=5 hrs
Unknown:
d= ?
Equation:
d=st
Substitution:
d=60 km/h∙5 hrs=300 km
Answer:
300 km
Item 3.a:
Given:
d=5 km+2 km+3 km=10 km
t=2 hrs+1 hr+1.5 hrs=4.5 hrs
Unknown:
s= ?
Equation:
s=d/t
Substitution:
s=(10 km)/(4.5 h)=2.22 km/h
Answer:
2.22 km/h
Item 3.b:
Given:
Δv=5 km+2 km+3 km=10 km
t=2 hrs+1 hr+1.5 hrs=4.5 hrs
Unknown:
v ̅= ?
Equation:
v ̅=Δv/t
Substitution:
v ̅=(10 km)/(4.5 h)=2.22 km/h
Answer:
2.22 km/h
Item 4:
Given:
d=400 km
s=45 km/h
Unknown:
t= ?
Equation:
t=d/s
Substitution:
s=(400 km )/(45 km/h)=8.889 hrs
Answer:
8.889 hrs
Item 5.a:
Given:
d=3 km+2 km=5 km
t=1 hr+0.5 hr=1.5 hrs
Unknown:
s= ?
Equation:
s=d/t
Substitution:
s=(5 km)/(1.5 hrs)=3.33 km/h
Answer:
3.33 km/h
Item 5.b:
Given:
Δx=3 km+2 km=5 km
t=1 hr+0.5 hr=1.5 hrs
Unknown:
v ̅= ?
Equation:
v ̅=Δx/t
Substitution:
v ̅=(5 km)/(1.5 hrs)=3.33 km/h
Answer:
3.33 km/h