Question

2. A block of mass 1 kg is thrown from the surface of the
earth with the speed of 10 m/s. Find the work done by the
gravitational force during vertical motion of the body.
(g = 10 m/s2)
pls help​

Answer 1

$\LARGE{\bf{\underline{\underline{GIVEN:-}}}}$

• Mass (m) = 1 kg.
• velocity (v) = 10ms⁻¹.
• Acceleration due to gravity (g) = 10ms⁻².

$\LARGE{\bf{\underline{\underline{TO:FIND:-}}}}$

• Work done by the gravitational force.

$\LARGE{\bf{\underline{\underline{SOLUTION:-}}}}$

We know that work done during vertical motion, i.e., kinetic energy is:

$\sf{\red{K.E.=\dfrac{1}{2} mv^2}}$

$\sf K.E. = \dfrac{1}{2} \times 1 \times 10^2$

$\sf K.E.=\dfrac{100}{2}$

$\boxed{\sf{\red{ K.E. = 50 J.}}}$

WORK DONE :- 50 J.