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is screw force the same as screw torque? explain.
a solid sphere,spherical shell, solid cylinder and a cylindrical shell all have the mass m and radius R. if they are all released from rest at the same elevation and roll without slipping, which reaches the bottom of an inclined plane first?
Romeo is chuckling pebbles gently up to juliets window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 4.5 m below her window and 5.0 m from the base of the wall. How fast are the pebbles going when they hit her window?
the platter of a computer hard drive disk rotates 5400 rpm. a) What is the angular velocity of the disk? b) If the reading head of the drive is located 3.0 cm from the rotational axis, what is the speed of the disk below it? c) What is the linear acceleration of this point? d) If a single bit requires 5um of length along the motion direction, how many bits/seconds can the writing head write when it is 3.0 cm from the axis?
a small block of mass m lies on top of hemisphere of radiys R which is smooth. what minimum horizontal velocity block should be given so that it may not slide down along surface?
what are the contributions of newton to physics ?
what are the contributions of newton to phyics ?
Freddy Frog drops vertically from a tree onto a horizontally moving skateboard. The skateboard slows. Give two reasons for this, one in terms of a horizontal friction force between Freddy’s feet and the skateboard, and one in terms of momentum conservation.
A block of mass m = 2.00 kg is released from rest at h = 0.800 m from the surface of a table, at the top of a θ = 30.0° incline as shown below. The frictionless incline is fixed on a table of height H = 2.00 m.
(a) Determine the acceleration of the block as it slides down the incline.
(b) What is the velocity of the block as it leaves the incline?
(c) How far from the table will the block hit the floor?
(d) How much time has elapsed between when the block is released and when it hits the floor?
a bat flying in a cave emits a sound and receives it echo .2 s later. How far away is the cave wall? Assume the speed of sound to be 340 m/s. Answer in units of m.