Mary applies a force of 78 N to push a box with an acceleration of 0.52 m/s2. When she increases the pushing force to 90 N, the box's acceleration changes to 0.79 m/s2. There is a constant friction force present between the floor and the box.   (a) What is the mass of the box in kilograms? _________ kg (b) What is the coefficient of kinetic friction between the floor and the box? _________

Q: .Which of the following concepts indicate that an object has been subjected to an unbalanced force?…

A:

Q: Number 1. A block of mass m = 5.8 kg is pulled up a  = 25° incline as in the figure with a force of…

A: Given: The mass of the block is 5.8 kg. The magnitude of the force is 32 N. The inclination angle is…

Q: A metal seat with mass m1 = 16 kg hangs from one end of a rope that passes over a frictionless…

A:

Q: A force F is applied on a block that is sliding along a frictional surface with a kinetic friction…

A: Part-1: Introduction: The force which is contact with object is known as contact force. Here,…

Q: A 10 kg block sits on a horizontal surface and is pushed parallel to that surface. The coefficients…

A: Given data:  Mass (m) = 10 kg Coefficient of static friction (μs) = 0.2 Coefficient of kinetic…

Q: The forces acting on the sailplane are its weight W = -500j (lb.) , the drag D = -200i + 100j (lb.),…

A: W = -500 j^ lb D = -200 i^ +  100j^ lb Lift force = L

Q: In the figure, a force of magnitude 10.3 N is applied to a block of mass m2= 0.5 kg. The force is…

A: Recall Newton's second law Fnet=ma Refer the FBD and applying newton's second law.

Q: A block of mass 132 kg lies on a horizontal plane. A horizontal force F of magnitude 1140 N is…

A:

Q: tension force on the box gravitational force on the box E

A: Given: The mass of the box is 4 kg. The acceleration due to gravity is 10 m/s2. The speed of the…

Q: What acceleration will be produced by a force of 2.0 x 10 N on a 1.0 x 10' kg cart? 2. Two forces…

A: Given Mass of car = m = 1.2 × 103 kg IInitial velocity = u = 10 m/s Final velocity = v = 20 m/s Time…

Q: The force F applied to an object with a mass of 4 kg on a horizontal plane gives an acceleration of…

A: Mass of object (m) = 4 kg acceleration (a) = 5 ms2coefficient of kinetic friction (μk) = 0.25

Q: A box is being pushed across a horizontal floor. If the net force (Fnet) is 1000 N and the box…

A:

Q: There are two blocks, one on top of the other, that are connected by an ideal massless rope and…

A: Free body diagrams of the blocks

Q: At t = 0, an object of mass m is at rest at x = 0 on a horizontal, frictionless surface. A…

A:

Q: A box of mass 15 kg is sitting on a horizontal floor, where the coefficients of static and kinetic…

A: SOlution: Given that m = 15 kg applied force F = 50 N μs=0.6μk=0.55

Q: Answer the word problem below with given and solution. 1.) Starting from rest, a 3.5 kg object…

A: The equations of motion are v=u+ats=ut+12at2v2=u2+2as

Q: 15. A box of mass 4.0 kg rests on a horizontal surface. When the box is pulled by a horizontal force…

A: Given: The mass of the object is 4 kg. The acceleration of the object is 2 m/s2. The applied force…

Q: A 78 kg crate rests on a rough horizontal surface. The coefficient of static friction and…

A: Mass (m) = 78 kg coefficient of static friction and coefficient of kinetic friction are 0.3 and 0.2…

Q: If a net horizontal force of 132 N is applied to a person with mass 60 kg who is resting on the edge…

A:

Q: A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 6.5 N…

A: Given mass m =2.5 kg  Applied force F = 6.5 kg  If applied force is greater than static friction…

Q: Objects 1 and 2 are connected by a string, as shown. They are moving toward the right, and the…

A:

Q: A box with a mass of (18.2 + A) kg is pulled across a floor using a horizontal force of (48.1 + B)…

A: The mass of the box is m = (18.2+A) kg. The horizontal force acting on the box is F = (48.1+B) N.…

Q: A block with mass m1 = 7.5 kg rests on the surface of a horizontal table which has a coefficient of…

A: According to the company policy, first three parts would be answered. Please post the rest…

Q: 13. A 1.5-kg cart is pulled with a force of 7.3 N at an angle of 40° above the horizontal. If a…

A:

Q: Two boys are pushing a cart with a force of 30 N each. The cart does not move. Which of the…

A: Given data:  Two boys pushing a cart F1 = F2 = 30 N Car is in rest Required: The frictional force…

Q: In an experiment designed to investigate the frictional forces between bodies, a force was applied…

A:

Q: A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman…

A: Using Newton's 2nd law: F_net = m*a m = mass of box = ? a = acceleration of box  = 3.50 m/s^2 F_net…

Q: (a) A force F pushes on a 25kg box as shown in the figure. The coefficient of static friction…

A: Free body diagram of block, From the figure,  For the given case, m= 25 kg

Q: An object with a mass of 7.8 kg is pulled on a horizontal surface by a horizontal pull of 50 N to…

A: mass of object (m) = 7.8 kg Horizontal force (F) = 50 N (towards the right)Frictional force (f) = 30…

Q: A block of mass 105 kg lies on a horizontal plane. A horizontal force F of magnitude 1001 N is…

A: The free-body diagram of the block on the horizontal plane is shown below. Here, m is the mass, F…

Q: If a net horizontal force of 132 N is applied to a person with mass 60 kg who is resting on the edge…

A:

Q: Block 1 with mass 66 kg is sitting on a horizontal frictionless surface as shown below. It is…

A:

Q: An object on a rope is lowered at a steadily decreasing speed?  Which is true? a) The rope tension…

A: Assume a situation in which an object of weight W on a rope is lowered at a decreasing speed such…

Q: .4N pulls horizontally on a 1.3-kg block that slides on a rough, horizontal surface. This block is…

A: We know that the force of  9.4 N  pulls horizontally on a m1= 1.3 kg and This block is connected by…

Q: According to the Newton's second law, which of the following is TRUE about a person pushing a lawn…

A: Answer Newton's second law states that acceleration which a net force on an object produces has a…

Q: Two forces FA and Fg are applied to an object whose mass is 7.20 kg. The larger force is FA .When…

A: given the mass of the object, m = 7.20 Kg In case 1, when both the forces act towards the east (same…

Q: A 2kg box is given a swift kick, and then allowed to slide along the ground until friction slows it…

A: Draw the FBD of the box.

Q: woman exerts a horizontal force of 145 N on a box with a mass of 37.2 kg If the box doesn't move,…

A: Given Mass of box is m=37.2 kg Applied force is F=145 N

Q: The figure shows two blocks connected by a cord (of negligible mass) that passes over a frictionless…

A:

Q: A firefighter of mass 79 kg slides down a vertical pole with an acceleration of 4 m/s 2 . The…

A: The mass of the fire fighter, m=79 kg   The acceleration, a=4 m/s2

Q: Two forces act on an object with F1 = (5.914 + 11.722) N and F2 = (−13.854 + 7.965) N. What is the…

A: The given forces are F1=5.914i^+11.722j^F2=-13.854i^+7.965j^

Q: A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of…

A: Given data: Applied force (F) = 100 N Angle (θ) = 37°, above the horizontal Mass (m) = 40.0 kg…

Q: A 40kg box is initially sitting at rest on a horizontal floor with a coefficient of static friction…

A: Given: The mass of the object is 40 kg. The coefficient of the static friction is 0.4. The free-body…

Q: Car A (mass = 1000 kg) was subjected to a horizontal force of 10,000 N to allow it to move along…

A: Given Mass of car A = 1000 kg Mass of car B = 1200 kg Force applied on car A = 10000 N Force applied…

Q: A block with mass 2500g is pulled by a horizontal rope along a horizontal frictionless surface. If…

A:

Q: A 25 kg box is on a 35° hill with a coefficient of friction of 0.1 and an additional applied force…

A: Mass of box, m = 25 kg Angle of hill, 35 degrees  Co efficient of friction = 0.1 Force applied…

Q: What will a spring scale read for the weight of a 58.0-kg woman in an elevator that moves (a) upward…

A: