Can an object have increasing speed while its acceleration is decreasing? Support your answer with an example
A)
No, this is impossible because of the way in which acceleration is defined.
B)
No, because if acceleration is decreasing the object will be slowing down.
C)
Yes, and an example would be an object falling in the absence of air friction.
D)
Yes, and an example would be an object rising in the absence of air friction.
E)
Yes, and an example would be an object released from rest in the presence of air friction.
E
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Which acid is present in vinegar?
a. HCl b. H3PO4 c. H2SO4 d. HC2H3O2
When a capacitor has a charge of magnitude 80 mC on each plate the potential difference across the plates is 16 V. How much energy is stored in this capacitor when the potential difference across its plates is 42 V?
a. 1.0 mJ b. 4.4 mJ c. 3.2 mJ d. 1.4 mJ e. 1.7 mJ
A light ray in water passes into air. The angle of incidence in the water is 40°. What is the angle of refraction in air if the index of refraction of water is 1.33?
A) 59° B) 0.59° C) 40° D) 1.33° E) 29°