Question
The kinetic energy of a body is directly proportional to
— ÂSolution
Kinetic energy KE = 1/2mv2 This shows KE increases quadratically with velocity.  If velocity doubles, KE becomes four times.  Important in dynamics and vehicle safety studies.
A man swims 2km/h against the stream and goes 1 km in 10 minutes along the stream, how much time will it take to cover 5 km in still water?
The velocity of a boat when moving downstream is 18 km/h greater than the speed of the stream. If it takes the boat 8 hours to travel 192 km downstream,...
The upstream speed of a boat is 12 km/hr. If the boat covers 180 km downstream in 5 hours, find the speed of the current.
The speed of a boat in still water is 5 km/hr and speed of current is 3 km/hr. If time taken to cover a certain distance upstream is 12 hours, then how ...
The speed of a boat in still water is 28 km/hr. If the boat covers 140 km in upstream in 7 hours, then find the time taken by the boat to travel 144 km ...
The speed of the stream is 20 km/h. Boat ‘A’ covers 120 km distance against the stream in 6 hours and boat ‘B’ covers 120 km distance against th...
- A boat moves at a speed of 11 km/hr in still water, while the current speed is 5 km/hr. If it takes a total of 20 hours to go ‘x’ km both upstream and ...
A boat goes 200 km downstream in 50 hours, and 90 km upstream in 30 hours. The speed of the stream is
A boat goes 240 km downstream in 12 hours, and 160 km upstream in 16 hours. The speed of the stream is Â
Ratio of speed of boat in downstream and speed of stream is 5:2, if speed of current is 4 km/hr, then find distance travelled (in km) upstream in 6 hours.
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