Riverboat Quiz Review

What is the angle of the top-right corner of this triangle?

What is the length of the side opposite the 38° angle of this triangle?

What is the length of the side adjacent to the 38° angle of this triangle?

A city jogger runs 13.0 blocks due east and then 7.0 blocks due south. What is the magnitude of the jogger's displacement?

A city jogger runs 13.0 blocks due east and then 7.0 blocks due south. What is the direction (from east) of the jogger's displacement?

Sort the following based on their effects on the time it takes for a riverboat to cross a flowing river.

Groups:

(a) Increase the time to cross

,

(b) Decreases the time to cross

,

(c) Has no effect on the time to cross

• Increasing the river's speed

• Decreasing the river's width

• Increasing the boat's speed

• Decreasing the boat's speed

• Decreasing the river's speed

• Increasing the river's width

Consider a boat that begins at point A and heads straight across a 90-meter-wide river. The river water flows south at a speed of 3 m/s.

A river monster is located at point C, which is 47.0 m downstream from where the boat is launched. What MINIUMUM boat speed is required to cross the river before reaching the river monster?

Tags

NGSS.HS-PS2-1