An office door is given a sharp push and swings open against a pneumatic device that slows the door down and then reverses its motion. At the moment the door is open the widest, (i) does the doorknob have a centripetal acceleration? (ii) Does it have a tangential acceleration?         (a) (i) No (ii) No         (b) (i) No (ii) Yes         (c) (i) Yes (ii) No         (d) (i) Yes (ii) Yes

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.95 m, rotating with an angular…

A: a) The expression for find centripetal acceleration is ac=v2r=ωr2r=ω2r Insert values in the above…

Q: (flywheel rotated about its center), The tangential acceleration at of point A is calculated to be…

A: Solution:-

Q: A planet orbits a star, in a year of length 2.56 x 107 s, in a nearly circular orbit of radius 2.53…

A: Given, time period of planet, T=2.56×107s radius of orbit in which planet is orbiting, rp=…

Q: A planet orbits a star, in a year of length 2.77 x 107 s, in a nearly circular orbit of radius 3.78…

A:

Q: You drive down the road at 38 m/s (86 mi/h) in a car whose tires have a radius of 38 cm. (a) What…

A: Given that, the value of radius and velocity. Then We have to determine the value of given parts.

Q: A car initially traveling at 29.7 m/s undergoes a constant negative acceleration of magnitude 2.00…

A: Given data The initial velocity of the car is u = 29.7 m/s. The negative acceleration of the car is…

Q: A disk 6.00 cm in radius rotates at a constant rate of 98.0 rev/s about its central axis. (a)…

A: Given:  radius of disc, r = 6 cm = 0.06 m  frequency of rotation, f = 98 rev/s  distance from the…

Q: A small coin is placed on a flat, horizontal turntable . The turntable rotates at a constant rate of…

A: According bartleby guidelines only three sub parts can be answered.  Given data-

Q: Express the angular speed of 40 degrees per second in (a) rev/s, (b) rpm, (c) rad/s.

A: (given) Angular speed = 40 °/s (a)                   1°/s = 0.00277777 rev/s Angular speed of 40 °/s…

Q: One end of a cord is fixed and a small 0.650-kg object is attached to the other end, where it swings…

A:

Q: In the figure, block 1 has mass m₁ = 460 g and block 2 has mass m2 = 500 g, and the pulley, which is…

A:

Q: Three people are standing on a horizontally rotating platform in an amusement park. One person is…

A: (a). Here all three people are stationary at their position and have same angular speed with respect…

Q: A turntable of radius 60cm undergoes constant acceleration from rest to 5.4 rad/s in 2.8s. for a…

A: Given. ωi=0ωf=5.4 rad/st1=1.2 sect2=2.8sec

Q: A planet orbits a star, in a year of length 3.48 x 10's, in a nearly circular orbit of radius 1.51 x…

A: Given data: Time period, T=3.48×107 s Radius of the orbit, R=1.51×1011 m

Q: A father and a daughter are riding a merry-go-round, which is turning at a constant rate. The father…

A:

Q: A car initially traveling at 24.2 m/s undergoes a constant negative acceleration of magnitude 1.70…

A:

Q: A motor increases its speed from 100 rev/min to'500 rev/min in 20 seconds. If this is done with a…

A:

Q: An ultracentrifuge accelerates from rest to 100,000 rpm in 2.0 min. (a)What is its angular…

A:

Q: A planet orbits a star, in a year of length 3.98 x 107 s, in a nearly circular orbit of radius 2.14…

A:

Q: A planet orbits a star, in a year of length 4.46 x 10' s, in a nearly circular orbit of radius 2.46…

A: Here,

Q: The driver of a car traveling at 22.5 m/s ap- plies the brakes and undergoes a constant deceleration…

A: Given data: Initial speed of the car (u) = 22.5 m/s Deacceleration of the car (a) = -1.34 m/s2…

Q: a year of length 3.58 x 107 s, in a nearly circular orbit of radius 2.02 x 1011 m. With r ar speed…

A:

Q: If the forearm rotates about the elbow an angular distance of 13.179 degrees, what is the linear…

A: Given, forearm rotates about the elbow an angular distance of 13.179 degrees    so  θ…

Q: A solid cylinder rolls down an incline at 41° from rest. (a) What is its acceleration (in m/s2)?…

A:

Q: A father fashions a swing for his children out of a long rope that he fastens to the limb of a tall…

A: solution as

Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.