Time and Speed
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Question 99
A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?
The average speed of a body in the above diagram is
16.67
1.67
0.167
166.7
A boat goes 6 km downstream in 20 min and 6 km upstream in 30 min. What is the speed of the boat in still water?
15 km/h
12 km/h
18 km/h
21 km/h
if train a and train b goes in opposite direction of each other and interchange their place after crossing each other.find the speed of train b if the both train took 9 and 16 hours respectively and speed of train a is 10km/h
- Ordinal
- Discrete
- Continous
- Nominal
A bullet is fired through a fixed thick board, in such a manner that the bullets line of motion is perpendicular to the face of the board. If the initial speed of the bullet is and it emerges from other side of the board with a speed of , then
(a) find the deceleration of bullet [assume constant] as it passes the board.
(b) find the total time the bullet is in contact with the board.
- 80 km/h
- 520 km/h
- 60 km/h
- 65 km/h
- None of these
- 55 km/hr
- 85 km/hr
- 25 km/hr
- 50 km/hr
36 km/h =
- Original speed = 10 km/hr, Length of the journey = 90km
- Original speed = 15 km/hr, Length of the journey = 100km
- Original speed = 25 km/hr, Length of the journey = 110km
- Original speed = 30 km/hr, Length of the journey = 120km
An athlete completes a 100 m race in 9.8 seconds. What is his speed in ? Assume the athlete is running at a uniform speed.
In which condition will the displacement and distance have the same magnitude?
If a person could fly non stop around the equator of earth and reaches back at initial point, the displacement is
2π radius of earth
2π (radius of earth)²
diameter of earth
zero