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State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed,... read more
State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity. read less

Pick out the two scalar quantities in the following list:force, angular momentum, work, current, linear... read more
Pick out the two scalar quantities in the following list:force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, relative velocity. read less

Rain is falling vertically with a speed of 30 m s-1. A woman rides a bicycle with a speed of 10 m s-1... read more
Rain is falling vertically with a speed of 30 m s-1. A woman rides a bicycle with a speed of 10 m s-1 in the north to south direction. What is the direction in which she should hold her umbrella ? read less

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A passenger arriving in a new town wishes to go from the station to a hotel located 10 km away on a straight... read more
A passenger arriving in a new town wishes to go from the station to a hotel located 10 km away on a straight road from the station. A dishonest cab man takes him along a circuitous path 23 km long and reaches the hotel in 28 min. What is (a) the average speed of the taxi, (b) the magnitude of average velocity? Are the two equal? read less

A man can swim with a speed of 4.0 km h-1 in still water. How long does he take to cross a river 1.0... read more
A man can swim with a speed of 4.0 km h-1 in still water. How long does he take to cross a river 1.0 km wide if the river flows steadily at 3.0 km h-1 and he makes his strokes normal to the river current? How far down the river does he go when he reaches the other bank? read less

In a harbour, wind is blowing at the speed of 72 km/h and the flag on the mast of a boat anchored in... read more
In a harbour, wind is blowing at the speed of 72 km/h and the flag on the mast of a boat anchored in the harbour flutters along the N-E direction. If the boat starts moving at a speed of 51 km/h to the north, what is the direction of the flag on the mast of the boat? read less

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The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with... read more
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40 m s-1 can go without hitting the ceiling of the hall? read less

A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground... read more
A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball? read less

A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed.... read more
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone? read less

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An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its... read more
An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity. read less

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