A 10 kg box is on the horizontal surface with an exerting force of 95.3 N to start a box in the horizontal surface. a. Calculate the coefficient static friction. b. If the box continues to move with an acceleration of 1.71 m/s. What is the kinetic friction
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- A 0.400-kg pendulum bob passes through the lowest part of its path at a speed of 3.00 m/s. (a) What is the tension in the pendulum cable at this point if the pendulum is 80.0 cm long? (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? (c) What is the tension in the pendulum cable when the pendulum reaches its highest point?Q5. A 50.4 N force is applied to keep a blok of 24.2 N on the side wall. The static and the kinetic friction coefficients are given as 0.60 and 0.40. Assume the blok is relased from stationary state, a. Does the block start to move? b. What force the wall apply to the block?A 400-N body starts up the incline of 30o with the horizontal (fk = 0.2) with a velocity of 3m/s. a. How long must a 500-N horizontal force act on the body to increase its velocity to 8m/s? b. How far will the body travel while the force is acting?
- 2. A 500 g block w/ an initial speed of 90 cm/s slides (to the right) along a horizontal tabletop against a friction force of 0.80 N. a. How far will it slide before stopping? b. What is the coefficient of friction between the block & the tabletop?A 70 kg box is resting on a reclining floor. The coefficient of fricion between the floor and the box is: static = 0.30, kinetic = 0.10. If the floor is to be inclined at an angle of 25 deg a. what would be the acceleration of the object along the direction of the inclined floor? b. what would be the vertical displacement of the box after 1.5 seconds? Express your answer in unit of meters. c. what is the total distance travelled by the box after 1.5 seconds? Express your answer in unit of meters.A box is projected upward onto a ramp that has a 15 degree incline. I know knows that it starts with an initial velocity of 8 m / s. The coefficient of kinetic friction between the box and the ramp is 0.12. Determine the following: a. The distance the box will travel on the ramp. b. The speed of the box when it returns to its original position.
- A factory needs to move packages from one level to another using a ramp. They want to choose a material that has a specific coefficient of friction with the packages that will be sliding down the ramp. What problem could occur if the coefficient of friction were too high? A.Packages would go too fast and could break at the end of the ramp. B.Packages could slow down too quickly and stop before the end of the ramp. C.Packages could break the ramp because gravity would increase. D.Packages could bounce off the ramp because normal force would increase.Open Response 3. This is a multi-part problem. Please answer all parts here. A 0.6 kg block is pulled up a rough 30° incline by a light string The string applies a constant force to the block. The block starts from rest and travels a distance of 2 m up the incline n 10 s. The coefficient of kinetic friction between the block and the incline is 04. a What is the block's acceleration? b. What is the tension in the string? Et L CnYour forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can only withstand about 1.3 kN. a. If a 140 g baseball strikes your head at 30 m/s and stops in 0.0015 s, what is the magnitude of the ball’s acceleration? b. What is the magnitude of the force that stops the baseball? c. What force does the baseball apply to your head? Explain. d. Are you in danger of a fracture if the ball hits you in the forehead? In the cheek?
- ans. a) 3.41 N a) What is the tension in the string? m/sec. The length of the string is 1.2 m. The mass of the ball is 400 g. b) Draw the force diagram for the forces on the ball. View from above 6. A person swings a ball on a string in a horizontal circle over his head. The speed of the ball is 3.2A 40.0-N box starts sliding from rest down a rough ramp 6.00 m long, inclined at 30.0 degrees from the horizontal. The magnitude of the friction force between the box and the ramp is 6.0 N. What is the speed of the box at the bottom of the plane? a. 7.75 m/s b. 4.5 m/s c. 1.60 m/s d. 6.42 m/s e. 3.32 m/s If a nonzero constant net external force acts on an object during a given period, which of the following statements must be true during that time? a. The object accelerates b. The magnitude of the object's velocity increases c. The acceleration of the object is increasing d. The object movesA horizontal carousel is rotating around its axis with constant angular velocity w. On the carousel there is a straight track passing through its middle. A cart of mass m is traveling along the track with constant velocity v relative to the carousel. Note that there is friction between the cart and the carousel. FR w XR a. Find the magnitude of the side force (that is in the direction of YR) that the track applies on the cart when the cart passing L. through point xR = Select one: a. 2mwv b. mwv C. mwv + mw² L d. mw² L e. 2mw²L 2mwv + mw² L