A 40 kg bike traveling down the road has a negative acceleration. What is true of the force? A. It is positive B. It doesn't exi
2 answers:
Answer:
C. It is negative
Explanation:
As we know that mass of the bike is given as
m = 40 kg
now we know by Newton's law of motion
here we know that
m = mass of the bike
a = acceleration of the bike
so here we will have
now if the acceleration of the bike is in negative direction
then we will get a negative force on it as per above formula
so correct answer will be
C. It is negative
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Answer:
Explanation:
1) True. The stored energy (U) is proportional to the electric field strength (E). The electric field strength decreases when a dielectric is introduced hence inserting a dielectric decreases U.
2) False. From the formula , capacitance is inversely proportional to distance hence if the distance is doubled, capacitance decreases.
3) False. As the distance between the electric field and the object increases, its electric field decreases.
4) False. If a dielectric is inserted, the plates are further separated. Q stays the same.
5) True. The electric field strength decreases when a dielectric is introduced and capacitance is inversely proportional to electric field hence Inserting a dielectric increases C
6) True. If a dielectric is inserted, the plates are further separated. Q stays the same.
7) True. When the distance is doubled, U increases
