A body is projected vertically upward with a | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The motion of a body under gravity is symmetric. The distance travelled by a body in the last second of its upward journey (ascent) is equal to th

Vedclass · Accepted Answer

$4.9$

Vedclass · Answer

(A) The motion of a body under gravity is symmetric. The distance travelled by a body in the last second of its upward journey (ascent) is equal to the distance travelled in the first second of its downward journey (descent) from the highest point.At the highest point,the final velocity $v = 0$.For the downward journey,the initial velocity $u = 0$ and the time $t = 1 \, s$.Using the equation of motion $s = ut + \frac{1}{2}at^2$:$s = 0 	imes 1 + \frac{1}{2} 	imes 9.8 	imes (1)^2$$s = 4.9 \, m$Thus,the distance travelled in the last second of the upward journey is $4.9 \, m$. This distance is independent of the initial projection speed.

$A$ body is projected vertically upward with a speed of $40 \, m/s$. The distance travelled by the body in the last second of its upward journey is ........... $m$. [Take $g = 9.8 \, m/s^2$ and neglect the effect of air resistance]

Similar Questions

$A$ stone thrown upward with a speed $u$ from the top of a tower reaches the ground with a velocity $3u$. The height of the tower is (in $u^2/g$)

$A$ body dropped from the top of a tower covers a distance $7x$ in the last second of its journey,where $x$ is the distance covered in the first second. How much time does it take to reach the ground?

Two balls of the same size,but where the density of one is greater than that of the other,are dropped from the same height. Which ball will reach the Earth first (air resistance is negligible)?

$A$ ball of mass $m_1$ and another ball of mass $m_2$ are dropped from equal height. If the time taken by the balls are $t_1$ and $t_2$ respectively,then:

$A$ ball of mass $m$ is thrown vertically upwards. Assume the force of air resistance has magnitude proportional to the velocity,and direction opposite to the velocity. At the highest point,the ball's acceleration is

Vedclass Test Series

Exam Paper Generator

Online Exam Module