Problem 7: A crate sits on a rough surface. Using a rope, a man applies a force to the crate as shown in the figure. The force is not enough to move the crate, however, and it remains stationary. If necessary, use Fs for the force of static friction, and Fk as the force of kinetic friction. Please use the interactive area below to draw the Free Body Diagram for the crate. * Add Force S Reset All F0 vx Ftotal,x: + (pos) Ftotal,y: 0

Problem 7: A crate sits on a rough surface. Using a rope, a man applies a force to the crate as shown in the figure. The force is not enough to move the crate, however, and it remains stationary. If necessary, use Fs for the force of static friction, and Fk as the force of kinetic friction. Please use the interactive area below to draw the Free Body Diagram for the crate. * Add Force S Reset All F0 vx Ftotal,x: + (pos) Ftotal,y: 0

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 114AP: A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30...

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Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (See the free-body diagram.) (b) Calculate the acceleration. (c) What would the acceleration be if friction were 15.0 N?
Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) An 1800-kg tractor exerts a force of 1.75104 N backward on the pavement, and the system experiences forces resisting motion that total 2400 N. If the acceleration is 0. 150 m/s2, what is the mass of the airplane? (b) Calculate the force exerted by the tractor on the airplane, assuming 2200 N of the friction is experienced by the airplane. (c) Draw two sketches showing the systems of interest used to solve each part, including the free-body diagrams for each.
Imagine an airplane flying at constant velocity. What must be the net force on the plane? Draw a free-body diagram for the plane.
Consider the baby being weighed in the following figure. (a) What is the mass of the infant and basket if a scale reading of 55 N is observed? (b) What is tension T1in the cord attaching the baby to the scale? (c) What is tension T2, In the cord attaching the scale to the ceiling, If the scale has a mass of 0.500 kg? (d) Sketch the situation, indicating the system of interest used to solve each part. The masses of the cords are negligible.
A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30 degrees with the horizontal. The coefficient of kinetic friction between the sled and the snow is 0.20. (a) If the force Is 33 N, what is the horizontal acceleration of the sled? (b) What must the force be in order to pull the sled at constant velocity?
(a) Give an example of different net external forces acting on the same system to produce different accelerations. (b) Give an example of the same net external force acting on systems of different masses, producing different accelerations. (c) What law accurately describes both effects? State it in words and as an equation.
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 force of gravity (magnitude and direction) that acts on the block? b. What is the y-component of the block’s acceleration?
Please draw an FBD for the following statements 1. A textbook sits at rest atop a table. What would it's free body diagram look like? 2. A massless spring scale holds a hanging mass in place like shown. What would a fbd of the spring scale look like? (Images is below. It's the first one) 3. a stack of textbooks sit at rest atop table. What would the fbd of the book on the the bottom book like? 4. A snowboarder with a frictionless snowboard is travelling down a hole. What would their fbd look like? ( image is below. It will be the second one)
Can you please draw the free body diagram of the problem? A mass of 10kg sits on a level surface. One end of the surface is raised until the block begins to slide down the ramp at a constant velocity and angle of 20⁰. a. What is the coefficient of friction between the block and the inclined plane? b. What is the weight of the Block,w? c. What is the Normal Force, N? d. What is the Frictional Force, Ff?
A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake as shown. (a) Calculate the minimum force F he must exert to get the block moving. (b) What is the magnitude of its acceleration once it starts to move, if that force is maintained?
A 525 N block is on a rough, horizontal surface with an applied horizontal force as shown in Figure 1. (a) If a force of 295N is required to start the block in motion, what is the coefficient of static friction, us? (b) If force of 205 N is required to maintain the block at constant velocity, what is the coefficient of kinetic friction, uk?
A person lying in a bunk bed pushes a 5 kg block across the ceiling. He uses a force P of magnitude 80 N and angle θ = 70°. The coefficient of kinetic friction between the block and the ceiling is 0.4. a. Draw the free body diagram of the block. b. What is the magnitude and direction of the block’s acceleration?