Complete the following exercises. (Assume g = 9.80 m/s2.) (a) A small block is released from rest at a height of 3.74 m above the ground and moves downward in free fall.   (i) How long does it take the block to reach the ground?   Units are required for this answer. (ii) What is the speed of the block just before it strikes the ground?   Units are required for this answer.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Complete the following exercises. (Assume g = 9.80 m/s2.)

(a) A small block is released from rest at a height of 3.74 m above the ground and moves downward in free fall.
  (i) How long does it take the block to reach the ground?
  Units are required for this answer.

(ii) What is the speed of the block just before it strikes the ground?
  Units are required for this answer.

(b) A frictionless incline is 5.00 m long (the distance from the top of the incline to the bottom, measured along the incline). The vertical distance from the top of the incline to the bottom is 3.74 m. A small block is released from rest at the top of the incline and slides down the incline.
(i) How long does it take the block to reach the ground?
  Units are required for this answer.

(ii) What is the speed of the block just before it strikes the ground?

(c) How do the answers in part (b) compare to the answers in part (a)? (Select all that apply. Speeds are considered approximately equal if they are within 5% of each other.)
It takes the block in (a) longer to reach the ground.The speed of the block in (b) is greater.The speeds are approximately equal.It takes the block in (b) longer to reach the ground.The speed of the block in (a) is greater.
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