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A ship is travelling due east at 10 km h-1. A ship heading 30° east of north is always due north from the first ship. The speed of the second ship in km h-1 is

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 226
The speed of a boat is 5 km hr-1 in still water. If it crosses a river of width 1 km along the shortest possible path in 15 min. Then velocity of the river is-
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 227
A boat P is moving at 40 km hr-1 and another boat Q is moving at 20 km h-1. Which one of the following is not a possible value for their relative velocity?
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 228

A boat man could row his boat with a speed 10 ms-1 He wants to take his boat from P to a point Q just opposite on the other bank of the river flowing at a speed 4 ms-1. He should row his boat

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 229
A boat takes 2 h to travel 8 km and back in still water. If the velocity of water is 4 km h-1, the time taken for going upstream 8 km and coming back is
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 230
A boat crosses a river with a velocity of 8 km h-1. If the resulting velocity of boat is 10 km h-1 then the
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 231
A man wearing a hat of extended length 12 cm is running in rain falling vertically downwards with speed 10 m/s. What should be the maximum speed with which man can run such that rain drops do not fall on his face (the length of his face below the extended part of the hat is 16 cm) ?
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 232
A boat is rowing in a river at the rate of 4.8 km h-1 with respect to river. The river flows at the rate of 6 km h-1. The speed of boat in ms-1 can be 
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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 233
Two boats A and B having same speed relative to river are moving in a river. Boat A moves normal to the river current as observed by an observer moving with velocity of river current. Boat B moves normal. to the river as observed by the observer on the ground.