Question

A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds. A) 5.3 meters/second B) 4.3 meters/second C) 9.8 meters/second D) 2.3 meters/second

Answer 1

A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds.The answr is letter D. 2.3 meters per second

Answer 2

Answer:

Option A is the correct answer.

Explanation:

Velocity of sled can be calculated by dividing displacement to time.

Displacement = 30 m

Time = 4s

$\texttt{Velocity, v = }\frac{30}{4}=7.5m/s$

Vertical velocity component is vsinθ

Vertical velocity = vsinθ = 7.5 x sin 45 = 5.3 m/s

Option A is the correct answer.