Question

acceleration due to gravity (10 m/s2) CAN HAVE POSITIVE AND NEGATIVE SIGNS. JUSTIFY THE QUESTION WITH THE HELP OF EXAMPLES.

PLEASE ANSWER, THANK YOU FOR YOUR HELP.

Answer 1

Answer:

Yes the gravitational can have both negative and positive sign when your dropping the stone from certain height then the gravitational is pulling towards it so the displacement will be positive which mean velocity positive then we say acceleration is positive and the velocity is changing every point of time and when you throw ball upward direction then when it reaches a certain height it's velocity is 0 then it come down it became negative velocity as u = 0 and v let it be 10 downward velocity which means a negative so we can say when take out the acceleration it wii eventually be negative for example -v-0 /1= -v/1 or -a

Answer 2

Explanation:

Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock. Convection includes sub-mechanisms of advection, and diffusion. Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place.