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Class 10 Class 12
A car moves a distance of 200 m. It covers the first half of the distance at speed 40 km/hr and second half of distance at speed v. The average speed is 48 km/hr. Find the value of v?

We have,

Distance moved, s = 2 km

Velocity, u1 = 40 km/hr

u2 = v

Average velocity =

On solving the equation, we get

v = 60 km/hr

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Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.

814 Views

Give three examples of vector quantities.

Force, impulse and momentum.
865 Views

What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views