1.
How fast is a runner travelling if she covers 100m in 12s?
Correct Answer
D. 8.33m/s
Explanation
The runner is traveling at a speed of 8.33m/s because 100m divided by 12s equals 8.33m/s.
2.
A cyclist travels 125km in 5hours. How fast is the cyclist moving?
Correct Answer
B. 25km/h
Explanation
The cyclist is traveling at a speed of 25km/h. This is determined by dividing the total distance traveled, 125km, by the total time taken, 5 hours. The resulting value is 25km/h, indicating the speed at which the cyclist is moving.
3.
A plane travels at 600km/h. How far will it travel in 3hr 30min?
Correct Answer
D. 2100km
Explanation
The plane travels at a speed of 600km/h. To find the distance it will travel in 3 hours and 30 minutes, we need to convert the time to hours. 30 minutes is equal to 0.5 hours. So, the total time is 3 + 0.5 = 3.5 hours. To find the distance, we multiply the speed by the time: 600km/h * 3.5 hours = 2100km. Therefore, the correct answer is 2100km.
4.
A snail is crawling for 45s at a speed of 0.35cm/s. How far does it travel?
Correct Answer
C. 15.75cm
Explanation
The snail is crawling at a speed of 0.35cm/s for 45 seconds. To find the distance traveled, we multiply the speed by the time, which gives us 0.35cm/s * 45s = 15.75cm. Therefore, the snail travels a distance of 15.75cm.
5.
The journey from Manster to Lendemon is 186km. If the train travels at 140km/h. How long will the journey take?
Correct Answer
E. 1.32hrs
Explanation
The journey from Manster to Lendemon is 186km and the train travels at a speed of 140km/h. To find the time it takes for the journey, we can divide the distance by the speed. Therefore, the journey will take approximately 1.32 hours (186km / 140km/h = 1.32hrs).
6.
A sprinter runs the 200m at 8.6m/s. How long does she take to complete the race?
Correct Answer
A. 23.3s
Explanation
The sprinter runs at a speed of 8.6 meters per second. To find the time taken to complete the race, we divide the distance (200 meters) by the speed. 200/8.6 = 23.3. Therefore, it takes the sprinter 23.3 seconds to complete the race.
7.
A Straight Sloping Line on a distance time graph means:-
Correct Answer
E. Constant Speed
Explanation
A straight sloping line on a distance-time graph indicates constant speed. This means that the object is moving at a consistent rate without speeding up, slowing down, going uphill, or going downhill. The slope of the line represents the speed, and if the slope is constant, it indicates that the object is maintaining a steady speed throughout the given time period.
8.
The slope on a distance-time graph represents:-
Correct Answer
C. Speed
Explanation
The gradient on a distance-time graph represents speed. The gradient is the slope of the line on the graph, which is calculated by dividing the change in distance by the change in time. Speed is defined as the rate at which an object covers distance, and it is calculated by dividing the distance traveled by the time taken. Therefore, the gradient on a distance-time graph represents the speed of an object.
9.
A curved line which is getting steeper on a Distance-Time graph represents:-
Correct Answer
B. Acceleration
Explanation
A curved line on a Distance-Time graph represents acceleration because it shows a change in speed over time. As the line gets steeper, it indicates that the object is accelerating at a faster rate. This means that the object is increasing its speed over time, rather than maintaining a constant speed or being stationary. The curvature of the line indicates a change in velocity, which is a characteristic of acceleration.
10.
Speed and Velocity are different. Velocity means:-
Correct Answer
B. Speed in a particular direction
Explanation
Velocity is defined as the speed of an object in a particular direction. It not only considers the magnitude of the speed but also the direction in which the object is moving. This is different from speed, which only measures the magnitude of the object's motion without considering the direction. Therefore, the correct answer is "Speed in a particular direction".