A 1.4 kg textbook is thrown out of a window at 8.67 m/s and directed at an angle of 50.1° above horizontal. The window is 6.26 m above the ground. The textbook strikes the ground at a speed of 10.2 m/s. How much work is done on the textbook by air-resistance?

An object is subjected to a friction force with magnitude 6.60 N, which acts against the object's velocity. What is the work (in J) needed to move the object at constant speed for the following routes? у (m) В (5.00, 5.00) x (m) A (a) the purple path O to A followed by a return purple path to O (b) the purple path O to C followed by a return blue path to O the blue path O to C followed by a return blue path to O (d) Each of your three answers should be nonzero. What is the significance of this observation? O The force of friction is a conservative force. O The force of friction is a nonconservative force.

A 12.0 kg box is given an initial push that starts it sliding across the floor. It eventually comes to a stop. If the box has an initial velocity of 3.5 m/s, how much work is done by friction to cause it to come to a stop? (Yes, you are correct, you do not know the coefficient of friction.)

An airplane flies 200 m at a constant altitude in a direction 30.0° south of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 3.0 N in a direction 30.0° north of west. How much work is done on the plane by the air?

A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force F⃗ =(34N)i^−(44N)j^ to the cart as it undergoes a displacement s⃗ =(−8.6m)i^−(3.5m)j^.  How much work does the force you apply do on the grocery cart?

A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 2.04 m above the floor with a speed of 7.43 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.17 m/s. What is the work done on the ball by air resistance, a nonconservative force?

The object is being pulled in a straight line along the ground by a 50-N force directed 60° above the horizontal. How much work does the force do in pulling the object 5 m? O 530 J O 125 J 0.55 J O 125 kJ O 53 J

A force with a magnitude of 60 N is applied at an angle theta= 50 to the horizontal to an object initially at rest, displacing it 5 m from its initial location. The object weighs 50 kilograms and there is no friction. After this displacement, the force is no longer applied. Determine the work being done by the force? How fast is the object when the force is removed? When the force is no longer exerted, the item falls down a 10-meter-high cliff. When it reaches the ground, what is its velocity? When it strikes the ground, it slides along the ground, which has a coefficient of kinetic friction of 0.25. How far does it go before coming to a stop?

The figure gives the acceleration of a 5.0 kg particle as an applied force moves it from rest along an x axis from x-0 tox-9.0 m. The scale of the figure's vertical axis is set by a,- 6.0 m/s². How much work has the force done on the particle when the particle reaches (a) x-4.0 m, (b)x - 7.0 m, and (c) x-9.0 m? What is the particle's speed and direction (give positive answer if the particle moves along x axis in positive direction and negative otherwise) of travel when it reaches (d) x - 4.0 m, (e) x - 7.0 m, and (f)x - 9.0 m? (a) Number i (b) Number i (c) Number i (d) Number i (e) Number i (f) Number i (₂8/) v Units Units Units Units Units Units 2 x (m) < <

A worker lifts a 20.0-kg bucket of concrete from the ground up to the top of a 20.0-m tall building. The bucket is initially at rest, but is traveling at 4.0 m/s when it reaches the top of the building. What is the minimum amount of work that the worker did in lifting the bucket? (A) 0.16 kJ (B) 0.40 kJ (C) 0.56 kJ (D) 3.92 kJ 400