Question

QUESTION 1 2.5 points Save Answer A block of mass 1.56kg is being pulled by a string parallel to the contact surface with a slowly increasing force. If the block remains stationary until the force reaches 10N, what is the static friction coefficient? QUESTION 2 2.5 points Save Answer A box of mass 3,401.62g is on level ground being pulled bya slowly increasing force at an angle 35.69 above horizontal. If the block is stationary until this force reaches of 15.74N, what is the static friction coefficient? QUESTION 3 25 points Save Answer The static frictional force exists in a range of values from zero to certain maximum O True O False QUESTION 4 2.5 points Save Answer Kinetic friction always points in the direction of the objects motion. O True O False QUESTION 5 25 points Save Answer Kinetic friction only occurs for objects that are in motion. O True O False QUESTION 6 2.5 points Save Answer If the simplified friction model, f- N, is true, when the normal force on an object is doubled, the kinetic friction force is also doubled O True O False

Answer 1

Slution Let m= 1.56 K 长- (mchi ーラー 10 与 ng 56 x 9.4 Nm