A person throws balls into the air vertically | vedclass

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

Question

(B) Let the time taken by the ball to reach the maximum height be $t$. According to the problem,$t = 1 \,s$. At maximum height,the final velocity $v =

Vedclass · Accepted Answer

$5$

Vedclass · Answer

(B) Let the time taken by the ball to reach the maximum height be $t$. According to the problem,$t = 1 \,s$. At maximum height,the final velocity $v = 0$. Using the equation of motion $v = u - gt$,we get $0 = u - (10)(1)$,which implies the initial velocity $u = 10 \,m/s$. The height $h$ reached by the ball is given by $h = ut - \frac{1}{2}gt^2$. Substituting the values,$h = (10)(1) - \frac{1}{2}(10)(1)^2 = 10 - 5 = 5 \,m$. Alternatively,using $h = \frac{1}{2}gt^2$ for a body falling from rest (which is equivalent to the upward motion),$h = \frac{1}{2} 	imes 10 	imes (1)^2 = 5 \,m$.

$A$ person throws balls into the air vertically upward at regular intervals of time of $1 \,s$. The next ball is thrown when the velocity of the ball thrown earlier becomes zero. The height to which the balls rise is (Assume $g = 10 \,m/s^2$) (in $\,m$)

Similar Questions

$A$ body is thrown vertically upwards with a velocity of $35 \ m/s$ from the ground. The ratio of the speeds of the body at times $3 \ s$ and $4 \ s$ of its motion is (Acceleration due to gravity $= 10 \ m/s^2$)

Two spheres of same size,one of mass $2\, kg$ and another of mass $4\, kg$,are dropped simultaneously from the top of Qutab Minar (height $= 72\, m$). When they are $1\, m$ above the ground,the two spheres have the same

$A$ body falls from rest in the gravitational field of the earth. The distance travelled in the fifth second of its motion is ......... $m$ $(g = 10\,m/s^2)$.

If the water falls from a dam into a turbine wheel $19.6 \ m$ below,then the velocity of water at the turbines is .................. $m/s$ (take $g = 9.8 \ m/s^2$).

$A$ body falls from a height $h = 200\,m$ (at New Delhi). The ratio of distance travelled in each $2\,s$ interval during $t = 0$ to $t = 6\,s$ of the journey is

Vedclass Test Series

Exam Paper Generator

Online Exam Module