5. A 25 kg block is pulled with an applied force of 200 N across a horizontal surface. The block experiences a frictional force of 75 N. a. Draw a free-body diagram for the block, including all forces acting on the block. b. Determine the net force acting on the block. c. Calculate the acceleration of the block.

A 67 kg circus gymnast is suspended in the air by two ribbons which are tied to the ceiling above him. The two ribbons make an angle of 48 degrees withrespect to the ceiling. Assume gymnast is at rest. a. What is the magnitude of the tension force in each of the ropes?b. What is the reaction force associated with the gymnast’s weight?c. If the gymnast suddenly lets go of one of the ropes, what will be the horizontal component of his acceleration just after letting go?

Starting from rest, a 150 kg body experiences a force of 100 newtons acting on it in a direction parallel to the positive x-axis and a force of 150 newtons acting at 55° with respect to the positive x-axis. a. What is the net force acting on the body?  Include direction. b. What is the acceleration of the body? c. What velocity does it reach after 5 seconds?

3. Starting from rest, a 125 kg body experiences a force of 150 newtons acting on it in a direction parallel to the positive x-axis and a force of 125 newtons acting at 45° with respect to the positive x-axis. a. What is the net force acting on the body? Include direction. b. What is the acceleration of the body? c. What velocity does it reach after 2.5 seconds?

A box is being pulled across a level floor by a rope attached to the box The rope is pulling partly upward at an angle of 30 degrees to the horizontal. In this circumstance A. The normal force between the box and the floor is greater than the weight of the box. B. The normal force between the box and the floor is less than the force of gravity on the box. C. The normal force between the box and the floor is the same as the force of gravity on the box. D. Which of the above is correct depends on whether or not the box is accelerating. E. Which of the above is correct depends on whether or not there is friction between the box and the floor. F. None of the above answers is correct.

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Explain Newton's second Law and solve related problems Given a block which is at rest on a perfectly flat smooth table. You push with your hand horizontally on the block with some force. If the mass of the block = 2.00 kg and the acceleration of the block = 5.00 m/s2 then what is the force on the block from your hand in SI units?   a. 2.50 N   b. 0.100 N   c. 0.400 N   d. 10.0 N   e. zero

You push a lawnmower (mass=15kg) across the lawn at constant speed. To do so, you must excert 200 N of force. The handle makes a 35° angle with the horizontal.  A. Draw the force diagram B. What is the x-component of the force you apply? C. How does it compare to the frictional force which opposes your effort? Explain. D. If the frictional force is reduced to 100 N, determine the acceleration of the lawnmower.

2. A 10. Kg box pulled with a 40. N force at an angle of 20. degrees above the horizontal. The coefficient of kinetic friction is 0.20. Note it is moving along the table top. a) Draw a FBD showing all forces and the components of the pulling force. b) Determine the normal force. c) Determine force of friction acting on the box. d) Determine the acceleration of the box. e) Assume the box started from rest and was pulled for 2.0 seconds. Then the pulling force was removed. (i) Find the speed of the box after the 2.0 seconds. (ii) Determine how long it took for the box to come to rest after the pulling force was removed. 10kg -> 40N <200

5. A 3 kg book is held against a wall with a force F at an angle of 30° as shown below. The coefficient of friction of the wall with the book is 0.3. A. Draw a free body diagram for the book. B. Determine the minimum force F needed for the book not to slide down the wall.