AP Physics 1easymcq1 pt
A boat crosses a river at 3.0 m/s north relative to the water while the water flows 4.0 m/s east. The boat's speed relative to the shore is
A.5.0 m/s
B.7.0 m/s
C.1.0 m/s
D.3.5 m/s
Explanation
Core Concept
Perpendicular components add by the Pythagorean theorem: √(3² + 4²) = 5.0 m/s.
Correct Answer
A5.0 m/s
More Unit 1: Kinematics practice questions
- hardA ball is kicked at 25 m/s at 53° (sin 53° = 0.80, cos 53° = 0.60, g = 10 m/s²). Its speed at the highest point is
- hardA driver moving at 20 m/s sees a red light 40 m ahead and brakes at 4.0 m/s². Which is true?
- hardA ball thrown upward at 20 m/s passes a ledge at 15 m height on the way down at time
- hardA bike's velocity is described by v(t) = 4t. The distance it travels between t = 1 s and t = 3 s is
- hardAn arrow is fired at 50 m/s at 37° above the horizontal (sin 37° = 0.60, cos 37° = 0.80, g = 10 m/s²). Its maximum height above launch is
Practice more AP Physics 1 questions with full explanations
Practice Unit 1: Kinematics Questions →