The chip, during the collision, has a change in momentum:
Δp = m · (v₂ - v₁)
The final speed is equal to zero, since it sticks to the spacecraft, therefore:
Δp = m · v
= 1.6×10⁻⁷ · 3×10³
= 4.8×10⁻⁴ kg·m/s
where we transformed the mass into the proper units of measurement (kg).
This change in momentum is equal to the impulse J:
Δp = J = F · t
We can solve for F
F = J / t = <span>Δp / t
= </span>4.8×10⁻⁴ / 6×10⁻⁸
= 8.0×10³ N
Hence, <span>the force exerted by the chip on the spacecraft is F = 8000N.</span>
Potential energy relative to the floor =
(mass) x (gravity) x (height off the floor) =
(2kg) x (9.8 m/s²) x (2m) =
39.2 kg-m²/sec² = <em>39.2 joules </em>
I agree with you the answer is A
C) explore alternative sources of energy, such as solar energy
Multiplication is commutative. So both
V=IR and V=RI is same and correct formula of Ohm's law.
