Summative Assessment Some Solved CBSE Sample Questions

An open car is moving with uniform velocity. A person sitting in the car projected a ball vertically upwards. The ball

A $130 \mathrm{m}$ long train is moving in a direction with speed $20 \mathrm{m} {\mathrm{s}}^{-1}$. Another train moving in opposite direction with $30 \mathrm{m} {\mathrm{s}}^{-1}$ and $120 \mathrm{m}$ long crosses the first train in a time

A stone is thrown vertically upwards by a boy. It returns to his hands in $3$ seconds. How high does the stone rise? $\left(\mathrm{g}=9.8 \mathrm{m} {\mathrm{s}}^{-2}\right)$.

Which of the following is a vector?

A body is travelling at a constant speed in a circle. It has

The angular velocity of earth's rotation on its geographical axis is

A particle is executing uniform circular motion in a path of radius $3 \mathrm{m}$ with a frequency of $1$ revolution per minute. By how much does the total distance travelled by the particle in $70$ seconds exceed the magnitude of its displacement over the same time interval?

A teacher has a habit of walking to and fro between the left and right ends of the classroom at a uniform speed while lecturing. She pauses for a fixed interval of time, every time she reaches an end. Let the left and right ends of her path be at $x=-L$ and $x=+L$ respectively. If at $t=0$ she starts moving from the right end, which of the following $x-t$ graphs describes her motion?