1. A man wanted to move a block the size 3m x 3m weighing 80kg. If the coefficient of friction between the block and the ground is 0.27. Which of the following methods should be used? a. Slide along the ground by pushing c. Lift it bodily b. Pull it d. Tip it over 2. The essential condition of equilibrium of a body is a. The algebraic sum of horizontal components of all forces must be zero b. The algebraic sum of vertical components of all forces must be zero c. The algebraic sum of forces about a point must be zero d. All of these 3. In which case would more power be needed? a. In lifting up a weight of 100kg at a constant speed of 3m/s b. In lifting up a weight of 100kg at a velocity 3m/s but accelerating upward 0.5m/s c. In lowering the weight at a constant speed of 3m/s d. In lowering the weight at a velocity of 3m/s and accelaration of 1m/s 4. Kinetic Friction is a. maximum value of frictional force when a body is about to move b. friction between two well lubricated bodies c. friction action when the body is in motion d. friction that keens a body in motion
1. A man wanted to move a block the size 3m x 3m weighing 80kg. If the coefficient of friction between the block and the ground is 0.27. Which of the following methods should be used? a. Slide along the ground by pushing c. Lift it bodily b. Pull it d. Tip it over 2. The essential condition of equilibrium of a body is a. The algebraic sum of horizontal components of all forces must be zero b. The algebraic sum of vertical components of all forces must be zero c. The algebraic sum of forces about a point must be zero d. All of these 3. In which case would more power be needed? a. In lifting up a weight of 100kg at a constant speed of 3m/s b. In lifting up a weight of 100kg at a velocity 3m/s but accelerating upward 0.5m/s c. In lowering the weight at a constant speed of 3m/s d. In lowering the weight at a velocity of 3m/s and accelaration of 1m/s 4. Kinetic Friction is a. maximum value of frictional force when a body is about to move b. friction between two well lubricated bodies c. friction action when the body is in motion d. friction that keens a body in motion
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter6: Applications Of Newton's Laws
Section: Chapter Questions
Problem 47P: (a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her...
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