In Figure (a), a constant horizontal force a is applied to block A, which pushes against block B with a 24.0 N force directed horizontally to the right. In Figure (b), the same force is applied to plock B; now block A pushes on block B with a 12.0 N force directed horizontally to the left. The blocks have a combined mass of 12.0 kg. What are the magnitudes of (a) their acceleration in Figure Ca) and (b) force a? В В
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- Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 81.9 N, Jill pulls with 69.1 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 175 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.Suppose you are pushing a box across the floor. The box has a mass of 50.0 kg, and there is a constant force of friction opposing your push of 75.0 N. As you push the box, it accelerates from rest to a speed of 2.50 m/s in 15.0 seconds. (a) What is the force of your push, in Newtons? (b) Suppose the box had a mass of 25.0 kg, and you pushed in with the same for that you found in part (a). What would the acceleration of the box be? How long would it take to reach a speed of 2.50 m/s, starting from rest?The forces in figure 1 act on a 1.9kg object. What is the value of ax, the x component of the object’s acceleration? Also, what is the value of ay, the y component of the object’s acceleration?
- A 7.7-N force pulls horizontally on a 1.6-kg block that slides on a smooth horizontal surface. This block is connected by a horizontal string to a second block of mass m2= 0.83kg on the same surface. (a) What is the acceleration of the blocks? (b) What is the tension in the string? (c) If the mass of block 1 is increased, does the tension in the string increase, decrease, or stay the same? Show your work and explain.Three blocks rest on a frictionless tabletop and are connected by strings as shown. The blocks have masses m1 = 2.25 kg, m2 = 3.85 kg, and m3 = 1.61 kg. You can neglect the mass of all strings in this problem. A rightward force of F = 23.9 Newtons is exerted on block 3. Calculate the tension T1 in Newtons. Calculate the tension T2 in Newtons.Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 98.1 N, Jill pulls with 90.7 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 115 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey. magnitude of the net force: What is the direction of the net force? Express this as the angle from straight ahead between 0° and 90°, with a positive sign for angles to the left and a negative sign for angles to the right. direction of the net force:
- An 8.6 kg body undergoes an acceleration of 2.7 m/s2. What is the magnitude of the resultant force acting on it (in N)? If this same force is applied to a 5.2 kg body, what is the magnitude of the acceleration (in m/s2)?A child decides to take her cat on a walk, but the cat does not cooperate. The child pulls on the 2.5 kg cat with force of 20 N in a direction that is 30 degrees above horizontal, and the cat resists being pulled forward with a horizontal force of 15 N. How much force is the child pulling with in the horizontal direction (the direction the cat will move)?Person A and person B are pulling on an object unearthed at an archeological dig. They are using ropes at an angle of 30° from the forward position. Each person pulls with a force of 70 N. The force of friction on the stone is 100 N. What is the net force on the stone?
- Krystal's cat, Charlie, had an unfortunate experience this morning. Charlie climbed the curtain and was afraid to come back down. Krystal heard the meowing and came to help him down. She decided this was a good opportunity to calculate the tension force Charlie exerted on the curtains. She placed him on a scale and used his mass to calculate the tension force on the curtains. If the cat caused 37N of tension on the curtain, what is Charlie's mass?Two blocks are in contact on a frictionless table. A horizontal force is applied to the larger block, as shown in the figure. (a) If m1 = 2.4 kg, m2 = 1.6 kg, and F = 3.8 N, find the magnitude of the force between the two blocks. (b) Assume instead that a force of the same magnitude Fis applied to the smaller block but in the opposite direction, and calculate the magnitude of the force between the blocks. (Why is the value calculated in (b) not the same as that calculated in (a)?)Sierra pulls east on a rope attached to a camel with a force of 40lbs. Willow pulls north on a rope attached to the same camel with a force of 30lbs. Canyon pulls southwest on the same rope with a force of 25 lbs. Determine the exact value of the magnitude of the resultant force on the camel and the direction of the force on the camel in degrees to the nearest tenth.