Embibe Experts Solutions for Chapter: Kinematics, Exercise 1: AP EAPCET - 20 Aug 2021 Forenoon

When a ball is thrown with a velocity of $50 \mathrm{m} {\mathrm{s}}^{-1}$ at an angle $30°$ with the horizontal, it remains in the air for seconds. (take $\left.\mathrm{g}=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

Two paper screens A and B are separated by $150 \mathrm{m}$. A bullet pierces A and then B. The hole in B is $15 \mathrm{cm}$ below the hole in A. If the bullet is traveling horizontally at the time of hitting A, then the velocity of the bullet at A is: $\left(g=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

Which of the following decreases, in motion on a straight line, with constant retardation?

An object dropped in a stationary lift takes time $t_1$ to reach the floor. It takes time $t_2$ when lift is moving up with constant acceleration. Then

An object travelling at a speed of $36\mathrm{kmph}$ comes to rest in a distance of $200 \mathrm{m}$ after the brakes were applied. The retardation produced by the brakes is

A ball is projected upwards. Its acceleration at the highest point is

An object is moving with a uniform acceleration which is parallel to its instantaneous direction of motion. The displacement $\left(s\right)-$ velocity $\left(v\right)$ graph of this object is

A hiker stands on the edge of a cliff $490 \mathrm{m}$ above the ground and throws a stone horizontally with an initial speed of $15 \mathrm{m} {\mathrm{s}}^{-1}$. The speed with which it hits the ground is