Question

. A ball falls off a table and reaches the ground in 1 s. Assuming g = 10 m/s2 , calculate its speed on reaching the ground and the height of the table.

Answer 1

given:t=1s;g=10m/s;v=?;u=0;h=?.
v=u+gt
v=0+10×1
v=10m/s. .........(answer)

s=ut+1/2at^2
h=ut+1/2gt^2
h=0×1+1/2×10×1×1
h=5 meter. ....(answer).

hope it is helpful for you

Answer 2

Answer:

Initial velocity u=0 Let final velocity is v and height is h.

Using v=u+at

⇒v=0−10×1=−10m/s

Using s=ut+

2

1

at

2

⇒−h=0×1−

2

1

×10×1

2

⇒h=5m