. An applied force is exerted on a book to move it at constant velocity to the right. Considering ional forces and neglecting air resistance, draw a free-body diagram to describe this situation.

A sled weighing 60.0 N is pulled horizontally across snowso that the coefficient of kinetic friction between sledand snow is 0.100. A penguin weighing 70.0 N rides on the sled, as in Figure P4.86. If the coefficient of static frictionbetween penguin and sled is 0.700, find the maximumhorizontal force that can be exerted on the sled before thepenguin begins to slide off.

Consider a ball of mass m that is tossed vertically into the air. Do not neglect drag. What is the free body diagram of the ball halfway between when it is thrown and when it reaches its peak height?

A student with a mass of 46 kg stands on a bathroom scale in an elevator. What can you say about the motion of the elevator at the moment that the bathroom scale reads 360 N? Use a force diagram and be as precise as you can when answering (if you can find the exact acceleration, do that).

A rocket takes off from Earth's surface, accelerating straight up at 45.2 m/s2. Calculate the normal force (in N) acting on an astronaut of mass 84.4 kg, including his space suit. (Assume the rocket's initial motion parallel to the +y-direction. Indicate the direction with the sign of your answer.)

A coin of mass m is at rest on a book cover which is at an incline angle relative to horizontal at as shown in the figure. There is friction f between the coin and the surface of the book so that the coin does not slide down the cover of the book. 70 (A) Draw a free body diagram for the coin on the surface of the inclined book cover, including all forces acting on the block as vectors. Make sure to label the vectors. Include x and y axes in your sketch (feel free to draw axes in any orientation you would like). (B) Use Newton's second law to write equations for forces acting on the coin in x and y dimensions (separately) as a function of the frictional force f, the mass of the coin m, the gravitational constant g, and the angle of the incline 0. (C) If the coin has a mass of 5.0 grams and the coefficient of static friction us is 0.37, find the maximum angle max such that the coin is stationary (ie does not slide).

Same rocket as in the previous question. After the rocket has been in flight for a while, having burned and exhausted 80,000 kg of propellant, its acceleration has reached 25.0 m/s². All this while the thrust has been constant at 5.00 x 106 N. What is the magnitude of the drag force (that is, the resistance from the air) at this point? Note that at this point the rocket's altitude is still low, so you can still take gravity to be g = 9.81 m/s² O 1.18 x 106 N O 8.23 x 105 N O 5.00 x 106 N O 3.00 x 106 N

At one point during a flight, a 7kg model rocket burning fuel, generating a 90N thrust and experiencing a 60N drag. What is the magnitude of the net force on the rocket? What is the magnitude of the rocket's acceleration?

A 30Kh desk sits on the floor. Draw a free body diagram and determine the normal force on the desk.

(a) What is the minimum force of friction required to hold the system of Figure P4.74in equilibrium? (b) What coefficient of static friction between the 100.-N block and thetable ensures equilibrium? (c) If the coefficient of kinetic friction between the 100.-Nblock and the table is 0.250, what hanging weight should replace the 50.0-N weight toallow the system to move at a constant speed once it is set in motion?