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5. A 25 kg box is pushed across the floor at a constant
5. A 25 kg box is pushed across the floor at a constant velocity. If the pushing force is 61 N, what is the coefficient of friction, µ?6. A 15 kg sled is dragged from rest across the snow with a pulli… read more
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A child pushes a 20 kg box across a wood floor as shown in
A child pushes a 20 kg box across a wood floor as shown in Figure 3. The force exerted by the child is 100 N and horizontal. If the box is moving with a constant speed, 2 m/s, (a). Find the magnitude … read more
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4. Suppose you have a 168-kg wooden crate resting on a
4. Suppose you have a 168-kg wooden crate resting on a wood floor. (a) What maximum force can you exert horizontally on the crate without moving it?the coefficient of static friction for a wooden crat… read more
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A man pushes a 20.0 kg wooden crate 50.0 m across a
A man pushes a 20.0 kg wooden crate 50.0 m across a horizontal wooden floor with a constant velocity. Calculate how much work was done on the box by friction as the man pushed the box across the horiz… read more
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A 5.0 kg coconut falls 3.0 m from a palm tree to the ground.
a 5.0 kg coconut falls 3.0 m from a palm tree to the ground. How much work has been done on the coconut by gravity?… read more
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A dog (mass of 11.5kg) sits on a sled (mass 4.9 kg) that is
a dog (mass of 11.5kg) sits on a sled (mass 4.9 kg) that is being pushed with a force of 33N on a flat snowy surface. if the acceleration of both is 1.6 m/s^2, what Is the coefficient of kinetic frict… read more
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A force of 50.0 N is required to start a 7.0 kg box moving
A force of 50.0 N is required to start a 7.0 kg box moving across a horizontal concrete floor. What is the coefficient of static friction? If the same force 50.0 N continues, the box accelerates at 0.… read more
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2) a) Consider two forces, one having a magnitude of 10 N,
2) a) Consider two forces, one having a magnitude of 10 N, and the other having a magnitude of 15 N. What maximum net force is possible when combining these two forces? What is the minimum net force p… read more
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1. A 1.0 kg mass (mA) and a 4.0 kg mass (mB) are attached to
1. A 1.0 kg mass (mA) and a 4.0 kg mass (mB) are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move. Find the acceleration of the larger mass. a… read more
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Q1 a wheel starts at rest and has a constant angular acc.
Q1 a wheel starts at rest and has a constant angular acc. If it reaches an angular vel of 24 rads/sec in 6 sec, find the angular acc. ALSO find the angular displacement in this time. Q2 For a roller c… read more
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You push a 45 kg wooden box across a wooden floor at a ...
You push a 45 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.24. Now you double the force on the box. How long would it take for the veloc… read more
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A 68 kg person on skis starts from rest down a hill sloped
A 68 kg person on skis starts from rest down a hill sloped at 39° from the horizontal. The coefficient of friction between the skis and the snow is 0.13. After the skier has been moving for 5.0 s, the… read more
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A 2.8 kg block slides down a 25 inclined plane with ...
A 2.8 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long. (a) What is the a… read more
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A 32 kg child puts a 15 kg box into a 12 kg wagon. The ...
A 32 kg child puts a 15 kg box into a 12 kg wagon. The child then pulls horizontally on the wagon with a force of 65 N. If the box does not move relative to the wagon, what is the static friction forc… read more
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Imagine that the coefficient of static friction s between ...
Imagine that the coefficient of static friction µs between a 25-kg box and the floor is .55. How hard would you have to push on the box to get it moving? Imagine that you have to exert a horizontal fo… read more
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Consider two blocks pushed along a frictionless surface by
Consider two blocks pushed along a frictionless surface by someone who exerts a constant force with his or her hand. Imagine that block A has a mass of 4.o kg block B has a mass of 2.0 kg and the hand… read more
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A coin with a mass of 4.98g is placed on a smooth turntable ...
A coin with a mass of 4.98g is placed on a smooth turntable 20.0cm from the center. The turntable disk is initially at rest. the turntable begins rotating about it's center with an angular acceleratio… read more
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a force of 26 N is needed to overcome a frictional ...
a force of 26 N is needed to overcome a frictional force of 5 N to overcome a frictional force of 5 N to accelerate a 3 kg mass across a floor. What is the acceleration of the mass?… read more
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