A boat with an output engine power of 15kW moves through water at a speed of 10ms. What is
the resistive force acting on the boat?
A. 0.15KN
B.
0.75kN
C. 1.5kN
D.
150KN
Answers
Explanation:
1. A student wants to determine the angular speed ω of a rotating object.
The period T is 0.50 s ±5 %. The angular speed ω is
What is the percentage uncertainty of ω?
A. 0.2 %
B. 2.5 %
C. 5 %
D. 10 %
ω =
2π
T
2. A student models the relationship between the pressure p of a gas and its
temperature T as p = + T.
The units of p are pascal and the units of T are kelvin. What are the fundamental
SI units of and ?
x y
x y
3. A sky diver is falling at terminal speed when she opens her parachute.
What are the direction of her velocity vector and the direction of her
acceleration vector before she reaches the new terminal speed?
Answer:
D
Explanation:
A boat with an output engine power of 15kW moves through water at a speed of 10ms-1
. What is
the resistive force acting on the boat?
A. 0.15kN
B. 0.75kN
C. 1.5kN
D. 150kN