A charge cloud system produces an electric field in air near the earths surface . A particle of charge -2×10^-9 C is acted on by a downward electrostatic force 3 × 10 ^-6 Nwhen placed in this field .The gravitational and electrostatic force respectively,exerted on a proton placed in this field are. IN THIS QUES WHY CANT WE USE (F=GMm/R ^2) FOR GRAVITATIONAL FORCE?

A charge cloud system produces an electric field in air near the earth

1.	A charge cloud system produces an electric field in air near the earths surface . A particle of charge -2×10^-9 C is acted on by a downward electrostatic force 3 × 10 ^-6 Nwhen placed in this field .The gravitational and electrostatic force respectively,exerted on a proton placed in this field are. IN THIS QUES WHY CANT WE USE (F=GMm/R ^2) FOR GRAVITATIONAL FORCE?
Answer» A charge cloud system produces an electric field in air near the earths surface . A particle of charge -2×10^-9 C is acted on by a downward electrostatic force 3 × 10 ^-6 Nwhen placed in this field .The gravitational and electrostatic force respectively,exerted on a proton placed in this field are. IN THIS QUES WHY CANT WE USE (F=GMm/R ^2) FOR GRAVITATIONAL FORCE?