A block and tackle is used to lift a 100-kg load. The lower set of pulleys...
A block and tackle is used to lift a 100-kg load. The lower set of pulleys has a mass of 20 kg. If the block and tackle has 10 strands between the pulleys what is the actual mechanical advantage of the block and tackle?
Homework Answers
The mechanical advantage is equal to number of strands of the pulley so mechanical advantage of the pulley is 10
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A block and tackle is used to lift a 100-kg load. The lower set
of pulleys...
Post-lab 4 Name: 1. A pendulum bob with a mass of 10 g (0.001 kg) has...
Post-lab 4 Name: 1. A pendulum bob with a mass of 10 g (0.001 kg) has a velocity of 0.5 m/s at its lowest point. At what height was it released? Equations: 1/2 my? = mgh implies h =v2/(29) 2. Suppose you apply a force of 5 N to a block-and-tackle system of mechanical advantage 2 to lift a 10 N weight. What length of string must you pull to lift the weight by 3 cm?
A 100 g block of copper (p = 8900 kg/m^3) and a 100 g block of...
A 100 g block of copper (p = 8900 kg/m^3) and a 100 g block of aluminum (p = 2700 kg/m^3) are connected by a massless string that runs over two massless, frictionless pulleys. The two blocks exactly balance, since they have the same mass. Now suppose the two blocks are submerged in water. What will happen? The copper block will fall, the aluminum block will rise. The aluminum block will fall, the copper block will rise. Nothing will change...
QUESTION 5 (100 marks) (a) A crane is to be used to lift materials at a construction site. The crane is composed of...
QUESTION 5 (100 marks) (a) A crane is to be used to lift materials at a construction site. The crane is composed of a vertical mast 60 m high, a horizontal jib (B-D) 20 m long and a counter-jib (A-B) 4 m long. The combined weight of the counter-jib plus the counterweight provides a load of 18,000 N at point A. The weight of the jib provides a load of 5,200 N at point c. Note: not to scale 20m...
A cord is used to vertically lower an initially stationary block of mass M = 10...
A cord is used to vertically lower an initially stationary block of mass M = 10 kg at a constant downward acceleration of g/6. When the block has fallen a distance d = 5.5 m, find the work done by the cord's force on the block.
A massless vertical rope is used to lower a block of mass 18 kg at constant...
A massless vertical rope is used to lower a block of mass 18 kg at constant acceleration 1.1 m/s2 downward. Find the work done by the tension in the rope, in J, after the block is lowered a distance of 54.5 m.
3. Extra Credit (15 pts.) A double-threaded screw (diameter 10 mm, pitch 2 mm) is used to adjust the position of a 500-kg block as shown. Show that it's possible to lower the block by turning the...
3. Extra Credit (15 pts.) A double-threaded screw (diameter 10 mm, pitch 2 mm) is used to adjust the position of a 500-kg block as shown. Show that it's possible to lower the block by turning the screw (that is, show that there isn't too much friction between the block and the incline). What minimum torque applied to the screw is required to lower the block down the incline? Assume a coefficient of static friction of 0.3 between all surfaces....
A helium balloon is used to lift a load of 100 N. The weight of the...
A helium balloon is used to lift a load of 100 N. The weight of the envelope of the balloon is 45.0 N and the volume of the helium when the balloon is fully inflated is 31.8 m3. The temperature of the air is 0°C and the atmospheric pressure is 1.00 atm. The balloon is inflated with a sufficient amount of helium gas that the net upward force on the balloon and its load is 31.2 N. Neglect any effects...
A helium balloon is used to lift a load of 100 N. The weight of the...
A helium balloon is used to lift a load of 100 N. The weight of the envelope of the balloon is 45.0 N and the volume of the helium when the balloon is fully inflated is 31.8 m3. The temperature of the air is 0°C and the atmospheric pressure is 1.00 atm. The balloon is inflated with a sufficient amount of helium gas that the net upward force on the balloon and its load is 31.2 N. Neglect any effects...
Please show work! A pulley of negligible mass is attached to a block weighing 504 N. A person uses the rope and pulley s...
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in...
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in 2.5 s. What is the power of the lift? (10 points) 6.what is the velocity of a 8.00 kg bowling ball if its kinetic energy is 87.5J?(15points) 7.A 800 N box is pushed across a level floor for a distance of S.0 m with a force of 450 N. How much work was done on the box? (15points) 8. A horizontal force of 19.6...
Post-lab 4 Name: 1. A pendulum bob with a mass of 10 g (0.001 kg) has a velocity of 0.5 m/s at its lowest point. At what height was it released? Equations: 1/2 my? = mgh implies h =v2/(29) 2. Suppose you apply a force of 5 N to a block-and-tackle system of mechanical advantage 2 to lift a 10 N weight. What length of string must you pull to lift the weight by 3 cm?
A 100 g block of copper (p = 8900 kg/m^3) and a 100 g block of aluminum (p = 2700 kg/m^3) are connected by a massless string that runs over two massless, frictionless pulleys. The two blocks exactly balance, since they have the same mass. Now suppose the two blocks are submerged in water. What will happen? The copper block will fall, the aluminum block will rise. The aluminum block will fall, the copper block will rise. Nothing will change...
QUESTION 5 (100 marks) (a) A crane is to be used to lift materials at a construction site. The crane is composed of a vertical mast 60 m high, a horizontal jib (B-D) 20 m long and a counter-jib (A-B) 4 m long. The combined weight of the counter-jib plus the counterweight provides a load of 18,000 N at point A. The weight of the jib provides a load of 5,200 N at point c. Note: not to scale 20m...
3. Extra Credit (15 pts.) A double-threaded screw (diameter 10 mm, pitch 2 mm) is used to adjust the position of a 500-kg block as shown. Show that it's possible to lower the block by turning the screw (that is, show that there isn't too much friction between the block and the incline). What minimum torque applied to the screw is required to lower the block down the incline? Assume a coefficient of static friction of 0.3 between all surfaces....
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in 2.5 s. What is the power of the lift? (10 points) 6.what is the velocity of a 8.00 kg bowling ball if its kinetic energy is 87.5J?(15points) 7.A 800 N box is pushed across a level floor for a distance of S.0 m with a force of 450 N. How much work was done on the box? (15points) 8. A horizontal force of 19.6...
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