alleryStart learning →A car covers 150 km in 3 hours at a steady pace. What is its speed?
- 60 km/h
- 45 km/h
- 50 km/h
- 450 km/h
Show answer and solution
Correct answer: C. 50 km/h
Speed is distance divided by time, so 150 km over 3 h gives 50 km/h.
Olympiad (Class 7) Motion and time — practice questions
Explore 52 free Motion and time questions in Olympiad (Class 7) Science. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–30 of 52.
A car covers 150 km in 3 hours at a steady pace. What is its speed?Read the answer and worked solution →A runner covers 100 m in 20 s. What is her speed?Read the answer and worked solution →A train runs at an average speed of 60 km/h for 4 hours. How far does it go?Read the answer and worked solution →A bus keeps an average speed of 40 km/h. How long does it need for 200 km?Read the answer and worked solution →A speed of 18 km/h is the same as how many metres per second?Read the answer and worked solution →A scooter moves at 72 km/h. What is its speed in metres per second?Read the answer and worked solution →A car drives 60 km at 30 km/h, then another 60 km at 60 km/h. What is its average speed for the whole trip?Read the answer and worked solution →A cyclist rides steadily at 12 km/h for half an hour. How far does she travel?Read the answer and worked solution →Which instrument in a car shows its speed at a particular instant?Read the answer and worked solution →Which of these gives a velocity, not just a speed?Read the answer and worked solution →A runner takes 80 s for one lap of a 400 m circular track. What is her average speed?Read the answer and worked solution →Which is the SI unit of speed?Read the answer and worked solution →Which unit is commonly used for the speed of ships and aircraft?Read the answer and worked solution →A Mach number is a speed divided by which other speed?Read the answer and worked solution →What can matter never reach, according to special relativity?Read the answer and worked solution →Speed is found by dividing which two quantities?Read the answer and worked solution →A car moves at a constant 50 km/h for 90 minutes. How far does it travel?Read the answer and worked solution →An object moves steadily at 15 m/s. What does this mean?Read the answer and worked solution →How does a speed of 54 km/h compare with 15 m/s?Read the answer and worked solution →Which is faster, 30 m/s or 100 km/h?Read the answer and worked solution →How many seconds are there in one hour?Read the answer and worked solution →A usual day is how many seconds long?Read the answer and worked solution →Which tool is meant for organising periods of time longer than a day?Read the answer and worked solution →A film lasts 5 minutes and 30 seconds. How many seconds is that?Read the answer and worked solution →A train leaves at 9:45 am and arrives at 1:15 pm. How long is the journey?Read the answer and worked solution →Which motion repeats regularly and so can be used to measure time?Read the answer and worked solution →Which clock, invented in 1955, replaced older astronomical time standards for most practical uses?Read the answer and worked solution →The modern second is defined using the vibrations of which kind of atom?Read the answer and worked solution →By how much do most neighbouring time zones differ?Read the answer and worked solution →How many fundamental physical quantities does the SI system have, with time as one of them?Read the answer and worked solution →
Worked practice questions
A runner covers 100 m in 20 s. What is her speed?
- 5 m/s
- 2 m/s
- 0.2 m/s
- 20 m/s
Show answer and solution
Correct answer: A. 5 m/s
Speed equals distance per unit of time, and 100 m divided by 20 s is 5 m/s.
A train runs at an average speed of 60 km/h for 4 hours. How far does it go?
- 240 km
- 64 km
- 60 km
- 15 km
Show answer and solution
Correct answer: A. 240 km
Distance is average speed times time, so 60 km/h multiplied by 4 h gives 240 km.
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