D Page view A" Read aloud Draw Highiight 1. Starting at rest on the top of a 23 m tall hill, a child on a sled rides down the hill, onto a flat plain, and slows to a stop due to a combination of friction and air resistance. If the child traveled a total distance of 39.1 m (measured along the surface of the snow), what was the magnitude of the average force from friction and air resistance on the sled? The combined mass of the child and sled is 32 kg.

m1 A block with mass m, = 8.8 kg is on an incline with an angle 8 = 22° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: H, = 0.2 and u, = 0.22. 1) When there is no friction, what is the magnitude of the acceleration of the block? m/s Submit You currentiy have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 2) Now with friction, what is the magnitude of the acceleration of the block after it begins to slide down the plane? m/s Submit You currently have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 3) m, To keep the mass from accelerating, a spring is attached. What is the minimum spring constant of the spring to keep the block from sliding if it extends x = 0.13 m from its unstretched length. N/m Submit You currently have O submissions for this question. Only…

You need to push a couch 4 m to the other side of the room. After the initial push to get it going you push on the 90kg couch with a steady horizontal force of 600 N. The coefficient of kinetic friction between the couch and the floor is 0.6.  1. What is the magnitude and direction of the frictional force on the couch?   2. What is the magnitude and direction of the net force on the couch?   3. What is the magnitude and direction of the acceleration of the couch?

empt in Progress In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 4.6 kg book is pushed from rest through a distance of 0.61 m by the horizontal 47N force from the broom and then has a speed of 1.4 m/s, what is the coefficient of kinetic friction between the book and floor? Number i Units

A sled and rider have a total mass of 60.0 kg. They are on a snowy hill. The coefficient of kinetic friction between the sled and the snow is 0.150. The angle of the hill's slope measured upward from the horizontal is 24.0°. What is the acceleration of the rider?Is the acceleration greater, less than, or equal to your result if a more massive rider uses the same sled on the same hill? Explain.

The block shown in figure #1 above has a mass of 4.30 kg. The applied force (? ⃑ ) has a magnitude of 31.2 N and is 32.0° above the horizontal, frictionless surface the block in on.  a. What is the normal force (magnitude and direction) that acts on the block? b. What is the acceleration (magnitude and direction) that is experienced by the block?

D Question 12 A moose pulls a 230-kg sled across a flat surface. The moose is connected to the sled by a rope that is angled 35 degrees from the horizontal direction, and the moose creates a constant tension of 850 N in the rope. Assume that friction between the sled and the ground is negligible. If the moose and sled start out motionless and the moose pulls the sled 19 meters across the ground, when is the moose pulling with the maximum amount of power? At the end. At the start The power is the same the whole time. Question 13 A moose pulls a 205-kg sled across a flat surface. The moose is connected to the sled by a rope that is angled 31.3 degrees from the horizontal direction, and the moose creates a constant tension of 864 N in the rope. Assume that friction between the sled and the ground is negligible. If the moose and sled start out motionless and the moose pulls the sled 33 meters across the ground, what is the final speed of the sled? Answer in m/s, giving the number only,…

A 24.0-kg box is released on a 27° incline and accelerates down the incline at 0.30 m/s² ▼ Part A Find the friction force impeding its motion. Express your answer to two significant figures and include the appropriate units. Ffr = 21 F Part B Submit Previous Answers Request Answer X Incorrect; Try Again μA Submit k = 17.5 m Determine the coefficient of kinetic friction. Express your answer using two significant figures. 15. ΑΣΦ ? Previous Answers Request Answer ?

Part A A truck with mass m has a brake failure while going down an icy mountain road of constant downward slope angle a (Figure 1). Initially the truck is moving downhill at speed vo. After careening downhill a distance L with negligible friction, the truck driver steers the runaway vehicle onto a runaway truck ramp of constant upward slope angle B. The truck ramp has a soft sand surface for which the coefficient of rolling friction is lr . What is the distance that the truck moves up the ramp before coming to a halt? Solve using energy methods. Express your answer in terms of m, a, vo, L, g, ß and ur. ? (vo +2gL sin a) 2g(u, cos B+ sin ß) Submit Previous Answers Request Answer Figure 1 of 1 X Incorrect; Try Again Provide Feedback Ski's Van Lines L. Distance Icy road Truck ramp TB

Plz use g = 9.8 m/s2