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#tower height

2 public questions tagged with this topic.

A ball is thrown horizontally from a tower with a speed of 8m/s. It lands 24m from the base. What is the height of the t

Horizontal distance x=vxt, so t=xvx=248=3s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 45 m as the result, so option A is correct.

Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Straight Line Motion - Mixed Concepts

A stone is thrown upwards at 15m/s from a tower. It hits the ground 4s later. What is the height of the tower? (Take g\=

Use y=v0t+12at2. Downward is positive, so v0=−15m/s, a=10m/s2. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 25 m as the result, so option B is correct.

Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Uniform Acceleration and Graphical Analysis