Q1- A boy having a mass of 75 kg holds in his hands a bag of flour weighing 40 N. With what force does the floor push up on his feet?

80. A man seeking to set a world record wants to tow a 109 000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 85 kg, and the coefficient of static friction between his shoes and the runway is 0.77. What is the greatest acceleration the man can give the airplane? Assume that the airplane is on wheels that turn without any frictional resistance.

Q4/ A 6 kg object undergoes an acceleration of 2 m/sec² . a- What is the magnitude of the resultant force acting on it ? b- If this same force is applied to a 4 kg object, what acceleration will it produce?

Q7: Block B in Figure rests on a surface for which the static and kinetic coefficients of friction are 0.60 and 0.40, respectively. The ropes are massless. What is the maximum mass of block A for which the system is in equilibrium? 20 kg 450 90 A

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10:54 PM e 97 p6 - Saved 1. The figure below represents a cart viewed from above being pulled by two children and experiencing a friction force. Determine the net/resultant force on the sled by graphical method using a scale factor 1.0 cm : 4.0 N. F1 = 8 N 300 Cart f= 6 N 450 F2 = 10 N 2. You take a three-day hike. On the first day, you travel 5.0 km heading east. On the second you enjoyed the scenery so much you forgot to take note how far you have walked and in what direction. On the third day, after wandering for 8.5 km and in the direction 370 south of west, you found yourself in the base camp. Determine your displacement during the second day of your trip. Use the scale 1.0 cm : 2.0 km. 3. A father pulls his child on a sled by pulling on a rope over his shoulder with a force as much as 75 N directed along the rope that makes an angle of 30° with the ground. The icy ground exerts about 15 N friction force on the sled. The combined weight of the sled and the child is about 180 N.…

4. The Trendelenburg Position. In emergencies with major blood loss, the doctor will order the patient placed in the Trendelenburg position, in which the foot of the bed is raised to get maximum blood flow to the brain. If the coefficient of static friction between the typical patient and the bedsheets is 1.20, what is the maximum angle at which the bed can be tilted with respect to the floor before the patient begins to slide? Consider that the mass = 1.5 kg 5. Consider the shown in the figure below. Block A weighs 45.0 N and block B weighs 25.0 N. Once block B is set into downward motion, it descends at a constant speed. (a) Calculate the coefficient of kinetic friction between block A and the tabletop. (b) A cat, also of weight 45.0 N, falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration (magnitude and direction)? m₁ P 6. In the figure below. m₁ = 20.0kg and a = 53.1º. The coefficient of kinetic friction between the block and the…

Alice and Bob had car trouble. Their car broke down and Bob could not restart it. Alice got out to push the car and after some time she asked Bob if he would trade jobs with her for a while. Bob answered, "It won't matter if I do. I took physics, and I know that no matter how hard I push on the car, it will push back on me just as hard so I won't accomplish anything. That's Newton's Third Law and it is always true. It has been tested millions of times. It wouldn't matter if I pushed the car. I wouldn't be able to push it anywhere." Aside from the fact that his relationship with Alice is probably fınished, which of the following correctly explains a flaw in Bob's logic? The third law says that the two forces he is talking about are only approximately equal. The third law does not apply in this case because the car is on wheels. O The two forces he is talking about are on two different objects. Thw two forces will not be the same because the two masses are different. The third law only…

The horizontal surface on which the objects slide is frictionless. If F = 18.0 N, what is the magnitude of the force (in N) exerted on the 3 kg block by the 1 kg block? 6.0 N F 1.0 kg 3.0 kg 2.0 kg Lütfen birini seçin: O a 12 O b. 21 c. 16 d. 10 e. 18

Q4) The Great Valerio is performing his high wire act. He stands on a (massless wire) exactly in the middle of two posts a distance d = 50.1 m apart. The wire buckles under his weight and he ends up h = 1.25 m below the vertical location where %3D the wire is attached to the posts. Valerio has a mass of my= = 73.5 kg. What is the tension of the wire ? h d/2 d/2 E