Homework Answers
statement D is correct.
as friction force will oppose the relative motion or tendency of relative motion. the direction oof frictional force will be parallel to the contact surface.
coefficient of stATIC FRICTION IS GREATER THAN KINETIC FRICTION COEFFICIENT.
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Which one of the following statements is TRUF? A. For any given pair of materials, mu,...
The coefficient of kinetic friction between two materials depends on Select one: a. the normal force...
The coefficient of kinetic friction between two materials depends on Select one: a. the normal force b. the surface area in contact c. the relative speed of the surfaces d. the type of surfaces
Q1: When two objects slide against oneanother, which of the following statements about the force offriction...
Q1: When two objects slide against oneanother, which of the following statements about the force offriction between them is true? Themagnitude of the frictional force is always equal to . Themagnitude of the frictional force is always less than . Themagnitude of the frictional force is determined by other forces onthe objects so it can be either equal to or less than . Q2: When two objects are in contact with norelative motion, which of the following statements about thefrictional...
Which ones did I get wrong ? kg block is sitting on a ramp that makes...
Which ones did I get wrong ?
kg block is sitting on a ramp that makes a 20 degree angle with the horizontal. What is the 1) A magnitude of the normal force exerted by the block on the ramp? A between 0 and 10 N between 10 and 20 N C) between 40 and 50 N D) between 20 and 30 N E) None of the above Which of the following is NOT true about forces? 2) A) Gravitational...
You are lowering two boxes, one on top of the other, down the ramp shown in...
You are lowering two boxes, one on top of the other, down the ramp shown in the figure (Figure 1) by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 18.0 cm/s . The coefficient of kinetic friction between the ramp and the lower box is 0.490, and the coefficient of static friction between the two boxes is 0.786. What force do you need to exert to accomplish this?...
Which of the following statements concerning friction is false? a) Keeping everything else constant, the maxium...
Which of the following statements concerning friction is false? a) Keeping everything else constant, the maxium frictional force that can act on a block sitting on a table will increase if extra mass is places on top of the block. b) For most pairs of surfaces, the coefficient of kinetic friction is less than the coefficient of static friction. c) The size of the frictional force can depend on the applied force. d) The frictional force is always proprotional to...
The critical angle is the largest angle for which the gravitational force does not yet cause...
The critical angle is the largest angle for which the gravitational force does not yet cause the block to move. Finding the angle is a problem in which we deal with the block as a particle in equilibrium. Analyze Because the block is an inclined surface, the normal force perpendicular to the surface does not balance the downward force of gravity. The normal force and the force of gravity produce a net force that tends to slide the block down...
High school physics problem
You are lowering two boxes, one on top of the other, down a ramp by pulling on a rope parallel to the surface of the ramp. Both blocks move with constant velocity of 15 ?/?. The coefficient of kinetic friction between the ramp and the lower box is 0.444 and the coefficient of static friction between the two boxes is 0.800. What is the magnitude and direction of the frictional force on the upper box? Magnitue of the applied force?...
Physics Exercise 5.33
You are lowering two boxes, one on top of the other, down the ramp shown in the figure by pulling on a rope parallel to the surface of the ramp. Both boxes movetogether at a constant speed of 17.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.499, and the coefficient of static frictionbetween the two boxes is 0.822.What force do you need to exert to accomplish this?What is the magnitude of the friction...
I just need help with part C please! I'm struggling! Thank you. a) If half of...
I just need help with part C please! I'm struggling! Thank
you.
a) If half of the weight of a flatbed truck is supported by its two
drive wheels, what is the maximum acceleration (in m/s^2) it can
achieve on dry concrete where the coefficient of kinetic friction
is 0.7 and the coefficient of static friction is 1.
The answer is 4.9 m/s^2.
b) Will a metal cabinet lying on the wooden bed if the truck
slip if it accelerates...
QUESTION 20 Which one or more of the following quantities will two observers always measure to...
QUESTION 20 Which one or more of the following quantities will two observers always measure to be the same, regardless of the relative velocity between the observers? A. The time interval between two events The length of an object c. The speed of light in a vacuum D. The distance travelled by the object QUESTION 21 Which one of the following statements concerning the dilated time interval is false? Alt is always greater than the proper time interval alt depends...
The coefficient of kinetic friction between two materials depends on Select one: a. the normal force b. the surface area in contact c. the relative speed of the surfaces d. the type of surfaces
Which ones did I get wrong ?
kg block is sitting on a ramp that makes a 20 degree angle with the horizontal. What is the 1) A magnitude of the normal force exerted by the block on the ramp? A between 0 and 10 N between 10 and 20 N C) between 40 and 50 N D) between 20 and 30 N E) None of the above Which of the following is NOT true about forces? 2) A) Gravitational...
The critical angle is the largest angle for which the gravitational force does not yet cause the block to move. Finding the angle is a problem in which we deal with the block as a particle in equilibrium. Analyze Because the block is an inclined surface, the normal force perpendicular to the surface does not balance the downward force of gravity. The normal force and the force of gravity produce a net force that tends to slide the block down...
I just need help with part C please! I'm struggling! Thank
you.
a) If half of the weight of a flatbed truck is supported by its two
drive wheels, what is the maximum acceleration (in m/s^2) it can
achieve on dry concrete where the coefficient of kinetic friction
is 0.7 and the coefficient of static friction is 1.
The answer is 4.9 m/s^2.
b) Will a metal cabinet lying on the wooden bed if the truck
slip if it accelerates...
QUESTION 20 Which one or more of the following quantities will two observers always measure to be the same, regardless of the relative velocity between the observers? A. The time interval between two events The length of an object c. The speed of light in a vacuum D. The distance travelled by the object QUESTION 21 Which one of the following statements concerning the dilated time interval is false? Alt is always greater than the proper time interval alt depends...
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