Ex. 53: A coin just remains on a disc rotating at 120 r.p.m. when kept at a distance of 1.5 cm from the axis of rotation. Find the coefficient of friction between the coin and the disc.
Q: A 1.25 g pepperoni rests at a distance of 7.5 cm from the centre of a pizza being spun by the pizza…
A: mass (m) = 1.25 g = 0.00125 kg distance from center (r) = 7.5 cm = 0.075 m Angular speed (ω) = 68…
Q: A skateboarder is attempting to make a circular arc of radius r = 19 m in a parking lot. The total…
A: Draw the free-body diagram of the skateboard. The diagram consists of the radial force only since…
Q: It has been suggested that rotating cylinders about 17.5 mi long and 6.12 mi in diameter be placed…
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Q: A bicycle of 40 Kg is racing in a circular track at a velocity of 20 ms. If the radius of curvature…
A: Given data: Mass of the bicycle m =40 kg the velocity of the bicycle v=20 m/s Radius of curvature r…
Q: fixed axis 0.69 m away. The mass is initially at rest and undergoes a constant angular acceleration…
A: Given: The Mass(m)= 0.39 kg. The distance (R)= 0.69 m. The angular acceleration α=4.77 rad/s2 The…
Q: being spun in a vertical Circie Wi niform spEed v=4 fm/S. (a) What is the tangential (parallel to v…
A: As it is given in the question that uniform speed of 4m/s. So, dv/dt = 0 Ans: 0 m/s2
Q: It has been suggested that rotating cylinders about 16.5 mi long and 4.65 mi in diameter be placed…
A: Given data The length of the cylinder is l = 16.5 mi. The diameter of the cylinder is d = 4.65 mi =…
Q: (a) A 15.0 kg child is riding a playground merry-go-round that is rotating at 30.0 rev/min. What…
A: Centripetal force - Centripetal force is defined as the force in which the force makes a body…
Q: It has been suggested that rotating cylinders about 17.0 mi long and 4.55 mi in diameter be placed…
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Q: The County Fair Swing carries the mass of riders and chairs in an unchanging circular path in an…
A: Since the ride is moving in horizontal direction, its acceleration in vertical direction and hence…
Q: A motor cyclist goes round a circular track at 72 km / hr. If he leans 45° from the vertical to…
A: Given, v=72 km/hr =72×518m/s=20 m/s we kow that v2= tan θ rg202=tan 45°×r×9.8 m/s2r=4001×9.8=40.81…
Q: A0.758 kg coin is placed at 0.298 from the center of a rotating horizontal turntable. When the coin…
A: Centripetal force is the force which keeps an object moving on a circular path. Direction of…
Q: An LP record rotates at 33.33 revs/min. A penny is placed flat on the record a distance 8cm from the…
A: Given: Angular velocity, ω=33.33 revs/min Distance, r=8 cm=0.08 m Static coefficient friction=μs
Q: It has been suggested that rotating cylinders about 20.0 mi long and 5.69 mi in diameter be placed…
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Q: body is being spun by a piece of string in a horizontal circle of radius 2.50 m on a flat,…
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Q: An LP record rotates at 33.33 revs/min. A penny is placed flat on the record a distance 8cm from the…
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Q: puck of mass m=0.075 kgis moving in a circle on a horizontal frictionless surface. It is held in its…
A: Mass of puck (m) = 0.075 kg Radius of path = length of string (R) = 0.42 m Time taken to complete…
Q: It has been suggested that rotating cylinders about 17.5 mi long and 6.31 mi in diameter be placed…
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Q: Ex. 54: A coin just remains on a disc rotating at a steady rate of 180 r.p.m. A coin is kept at a…
A: Solution:-Given thatN=180 rpmr=2 cm=0.02 m
Q: a vehicle with a mass of 2.5x10^3 kg is driving at a speed of 56 km/h around a level roadway with a…
A: Given , mass of vehicle , m = 2.5×10-3 kg Speed , v = 56 km/hr =56×518 = 15.56 m/s…
Q: A 55.3-kg ice skater is moving at 4.18 m/s when she grabs the loose end of a rope, the opposite end…
A: Solution: Given: m = mass of ice skater = 55.3 kg v = speed of ice skater = 4.18 m/s r = radius of…
Q: Plot (Graph) the Centripetal Force as a function of Angular Velocity Static Force Angular Velocity…
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Q: A car is driving on a flat, circular track and accelerates uniformly from rest with a tangential…
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Q: You tie a small 68.0-g pebble to a string and start spinning it in a horizontally-oriented circle at…
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Q: A hockey puck with mass 230 g is attached to a rope of length 49.0 cm and swung in a horizontal…
A: Given information:Mass of the hockey puck (m) = 230 g = 0.23 kgThe length of the rope (r) = 49 cm =…
Q: It has been suggested that rotating cylinders about 15.0 mi long and 5.89 mi in diameter be placed…
A: Given, l= 15mi =15*1609m = 24135 m d= 5.89mi = 5.89*1609m =9477.01 m Where, l is the length of the…
Q: A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 30 cm diameter stone…
A: friction force=Normal Force(coefficient of static friction) friction force=Torque/r Torque=angular…
Q: An LP record rotates at 33.33 revs/min. A penny is placed flat on the record a distance 8cm from…
A: For penny to remain stationary the centripetal force should be equal to the friction force.
Q: A rocket, launched from the Earth, shuts off its engines when its speed is 5.10 km/s. It reaches a…
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Q: It has been suggested that rotating cylinders about 13.0 mi long and 4.81 mi in diameter be placed…
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Q: Does it really help to run hot water over a tight metal lid on a glass jar before trying to open it?…
A: Given data, A glass jar with tight metal lid is given.
Q: A 720-kg race car can drive around an unbanked turn at a maximum speed of 47 m/s without slipping.…
A:
Q: It has been suggested that rotating cylinders about 18.5 mi long and 4.60 mi in diameter be placed…
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Q: A 720-kg race car can drive around an unbanked turn at a maximum speed of 46 m/s without slipping.…
A:
Q: A 5 kg mass is attached to a massless string and is being rotated in a horizontal circle. The length…
A: The free-body diagram of the mass in the horizontal circle is shown below. Here, T is the tension,…
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