Question

Q. An object is thrown vertically upwards and rises to a height of 10 m. Calculate
[i] the velocity with which the object was thrown upwards.
[ii] the time taken by the object to reach the highest point.

Answer 1

Answer:

Distance travelled, s = 10 m

Final velocity, v = 0 m/s

g = -9.8 m/s

2

1) Using,

v

2

−u

2

=2gs

u

2

=196

u=14m/s, where u is the velocity with which the object is thrown upwards.

2) Using,

v=u+gt

t=

g

v−u

=1.43 sec

Answer 2

Answer:

(i) initial velocity(u)= 10m/s

(ii)time taken(t)= 1sec

Explanation:

Take value of -g= -9.8m/s since it opposes gravity.

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