ball tied at the end of a perfect string tied tightly (assume fixed) to a wooden bar at the other end is rotating with constant angular velocity. Its tangential velocity will _______ a) Increase with time b) Decrease with time c) Will remain constant d) Will decrease exponentially
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A: Given:
ball tied at the end of a perfect string tied tightly (assume fixed) to a wooden bar at the other end is rotating with constant
a) Increase with time
b) Decrease with time
c) Will remain constant
d) Will decrease exponentially
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- 6) Suppose the lady bug's position on a wheel is given as θ=7t-3t^2, where θ is in radians and t is in seconds. what is the lady bug's instantaneous angular acceleration at t=5x10^250 seconds? a) cannot be determined b) 10x10^125 rad/s^2 c) -6 rad/s^2 d) -3 rad/s^2 e) -12 x10^95 rad/s^2(a) What is the magnitude of the tangential acceleration of a bug on the rim of a 10.5-in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 76.0 rev/min in 3.60 s? ] m/s² (b) When the disk is at its final speed, what is the magnitude of the tangential velocity of the bug? m/s (c) One second after the bug starts from rest, what is the magnitude of its tangential acceleration? m/s² (d) One second after the bug starts from rest, what is the magnitude of its centripetal acceleration? m/s² (e) One second after the bug starts from rest, what is its total acceleration? (Take the positive direction to be in the direction of motion.) magnitude m/s² direction from the radially inward direction Need Help? Read ItDuring the last rotation, a hammer thrower maintains a constant acceleration of his hammer, from 28 m/s at the beginning of the rotation to 32 m/s at the time of release. a) If the radius of the hammer's rotations is 1.3 m, what is the total linear acceleration when the hammer has covered 3/4 of the last rotation? Steps: 1) Find the tangential acceleration of the hammer: m/s2 2) Find the tangential velocity after 3/4 of the final rotation: m/s. (Note, this is NOT just 3/4 of the way from 28 to 32 , because you travel further in a given time at higher speed.) 3) Find the radial acceleration of the hammer after 3/4 of the final rotation: m/s2. 4) Find the total acceleration after 3/4 of the final rotation: m/s2. b) How far will the throw go, if the initial launch angle is 41 degrees above the horizontal, 1.9 m above the ground. Steps: 1) Find the time-of-flight: s 2) Find the horizontal velocity: m/s 3) Find the horizontal distance: m.
- A rock tied to the end of string swings at a constant angular rate. If you are told that the string can support a total of 85 N of force before breaking, what is the maximum angular velocity the rock can rotate if the rock has a mass of 0.16 kg, and the length of the string is 0.5 m? Give your answer in units of radian per secondA string is wound around the rim of a uniform disc that is pivoted to rotate without friction about a fixed axis through if center. The mass of the disk is 5 kg with a radius of 45 cm the string I’d pulled with 15 n of force . What is it’s angular velocity after 7 secondsProblem A) At a circus you see a man spinning plates with radii of 75 cm on top of long poles. The plates have a constant angular acceleration of 0.6 rad/s?. Assuming the plates start from rest, after a time of 8 seconds calculate a) how many revolutions they have made, b) their angular velocity, c) their tangential acceleration, d) their radial acceleration, and e) their overall acceleration, magnitude and direction with respect to the edge of the disk.
- 4) suppose a lady bug's position on a wheel is given as θ=7t-3t^2, where θ is in radians and t is in seconds. What is the lady bug's instantaneous angular velocity at t=3 seconds? a) 20 rad/s b) -11 rad/s c) 3.0 rad/s d) -15 rad/s e) -18 rad/sNeeds Complete typed solution with 100% accuracy.(a) What is the tangential acceleration of a bug on the rim of a 5.0 in. diameter disk if the disk moves from rest to an angular speed of 76 rev/min in 5.0 s? |m/s2 (b) When the disk is at its final speed, what is the tangential velocity of the bug? m/s (c) One second after the bug starts from rest, what is its tangential acceleration? ]m/s? What is its centripetal acceleration? m/s? What is its total acceleration? |m/s² ° (relative to the tangential acceleration)