Answer:
(d) Negative.
Explanation:
let's test each at a time.
(a) It can't be 0, because cup would slide back other wise.
(b) Positive, well if forward is positive, than the work done against the forward acceleration must be negative , so it can't be positive.
(c) Equal to non-conservative work done by the car's engine.
well no, because work done by car's engine dosen't go all of it into getting car to move, so it can't be that.
(d) negative, this look like it, because work that friction does must be nagative to counteract positive thrust of car which is positive and in forward direction.
(d) this can't be true.
So the answer is (d) negative.
It is customary to work in SI units.
Calculate the volume of the concrete.
V = 3.7*2.1*5.8 cm³ = 45.066 cm³ = 45.066 x 10 ⁻⁶ m³
The mass is 43.8 g = 43.8 x 10⁻³ kg
The density is mass/volume.
Density = (43.8 x 10⁻³ kg)/(45.066 x 10⁻⁶ m³) = 971.9 kg/m³
Answer: 971.9 kg/m³
Answer:
6.04788 in
78.38779 m/s
0.88159 kg
34.55294 J
Explanation:
Circumference is given by
Diameter is given by
The diameter is 6.04788 in
Volume of sphere is given by
The volume is
Fall velocity is given by
The velocity of the fall will be 78.38779 m/s
Mass is given by
The mass is 0.88159 kg
Kinetic energy is given by
The kinetic energy is 34.55294 J
Answer:
E0
Explanation:
Yes. The "0" indicates that it is spherical
