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7. A body of mass 3 kg falls from a height of 45 cmabove the ground. Calculate its velocity when it touches the ground.

7. A body of mass 3 kg falls from a height of 45 cmabove the ground. Calculate its velocity when it touches the ground.

College Physics
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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7. A body of mass 3 kg falls from a height of 45 cmabove the ground. Calculate its velocity when it touches the ground. 8. A ball of mass m3 6 kg is dropped from a height (h = 10 m) above the ground. Find the speed of the ball when it is at a height (h = 4 m) above the ground. h10m hr=4 m 8 9. A 25 kg crate slides down a ramp. The ramp is 2 min length and inclined at an angle of 30 as shown in Figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 6 N, and continues to move a short distance on the horizontal floor after it leaves V, = 0 d= 2 m 1 m the ramp. 30.0 a. Use energy methods to determine the speed of the crate at the bottom of the ramp. b. Howfar does the crate slide on the horizontal floor if it continues to experience a friction force of magnitude 4 N? Solve all they connected
Transcribed Image Text:7. A body of mass 3 kg falls from a height of 45 cmabove the ground. Calculate its velocity when it touches the ground. 8. A ball of mass m3 6 kg is dropped from a height (h = 10 m) above the ground. Find the speed of the ball when it is at a height (h = 4 m) above the ground. h10m hr=4 m 8 9. A 25 kg crate slides down a ramp. The ramp is 2 min length and inclined at an angle of 30 as shown in Figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 6 N, and continues to move a short distance on the horizontal floor after it leaves V, = 0 d= 2 m 1 m the ramp. 30.0 a. Use energy methods to determine the speed of the crate at the bottom of the ramp. b. Howfar does the crate slide on the horizontal floor if it continues to experience a friction force of magnitude 4 N? Solve all they connected
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