5. Clarice moves an 800. gram set of weights by applying a force of 1.2 N. What is the coefficient of friction? 0.15

17. A force F is used to hold a block of mass m = 4.62 kg on an incline as shown in the diagram. The plane makes an angle of 0 = 26.9° with the horizontal and F is perpendicular to the incline. The coefficient of static friction between the plane and the block is 0.206. What is the minimum force, F, necessary to keep the block at rest? F a. 59.1 N b. 118 N c. 45.3 N d. 19.6 N e. 88.6 N

A horizontal force is used to pull a 5.0-kilogram cart at a constant speed of 5.0 meters per second across the floor. The force of friction between the cart and the floor is 10. newtons. V 5.0 m/s Horizontal force 5.0 kg Floor 127. What is the magnitude of the horizontal force along the handle of the cart? 128. Calculate the weight of the cart.

2. What force is needed to pull a 75 N box up a 35° incline at a rate of 1.5 m/s², if the coefficient of friction is 0.23?

23. What is the accelerallof U tIT system? 3.NZ 24. What is the tension on the string? 2 howmor In the following diagram, block B weighs 711 N. The coefficient of static friction between the block and the table is 0.35, and the angle 0 is 30 degrees, assume that the cord between B and the knot is horizontal Ma tan 30 Bo 25. Find the static frictional force ? M. -7.24, 7/1 26. Find the maximum weight of block A for which the system 1-72:5g 98 T Ti కి 1/ will still be stationary. Al m 7, A 5000 kg dump truck has a maximum 400 hp (1 hp 746 W), and it is moving up on an inclined roa slope of 15 degrees. If the frictional coefficient on the road is 0.80, what is the max constant speed that ucker can maintain on the inclined? F v

A block of weight 25 kg is resting on an inclined surface with dimensions of 4 meter wide and 3 m high (See figure at the fight). Find the following: 5 m 3 m 37 4 m 5. Find the friction force Ff a. 19.96 N b. - 19.86 N c. 195.66 N d. 147.44 N 6. Find the coefficient of static friction us a. 0.75 b. 1.32 c. 0.79 d. 0.6

Question 130

Chloe is helping Tina move. Tina has to load a 265 kg box of chocolates and coffee up an incline of 25o, which also has a coefficient of static friction of 0.50. Chloe applies a force on the box at an angle of 30o with respect to the ramp. What is the minimum force needed to slide the box up the ramp? I know the answer is 2037.93N 30degrees up respect to the ramp but I dont know the steps to solve it.

8. A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley may be considered frictionless. The coeffi- cient of static friction between the block and the plane is us; and the coefficient of kinetic friction is k 0 A. g D. g - Hk sin(0) m a. What is the magnitude of the static frictional force acting on the block? B.m g [1 - sin(0)] C. mg D. mg cos(0) B. g - Hk cos(0) A. m g sin(0) E. mg [1 - cos(0)] b. If the rope were cut between the block and the pulley, what would be the magnitude of the acceleration of the block down the plane? C. g [sin(0) - μ cos(0)] sin(0)] c. If the mass of the suspended object is doubled, what will be the acceleration of the block up the plane? B. g [2 tan(0) - uk sin(0)] D. 2g [μ sin(0) - cos(0)] m E. g [tan (0) A. g [2 - μk sin(0)] C. g [2 cos(0) - μ sin(0)] E. g [2 sin(0) Hk Cos (0)]. -

4. A 75 kg box slides down a ramp inclined at 250 with an acceleration of 3.60 m/s?. a) Find the coefficient of friction. b) What acceleration would a 175 kg box have on this ramp?