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A cart on a linear track has a uniform acceleration of 0.172m/s2. What is the velocity of the cart 4.00 s after it is released from rest?
A proton with a speed of 3.0 x 105 m/s falls through a potential difference V and thereby increases its speed to 9.0 x 105 m/s. Through what potential difference did the proton fall
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
A box slides across a frictionless floor with an initial speed v = 4.9 m/s. It encounters a rough region where the coefficient of friction is uk = 0.3. What is the shortest length of rough floor which will stop the box
A baseball is thrown horizontally at a speed of 43 m/s. When it reaches home plate, what is the horizontal component of its velocity
Calculate at what speed Earth would have to rotate in order that objects at the equator would have no weight. Assume the radius of Earth to be 6400 k
Two blocks of weights 24.0 and 50.0 N are connected by as massless string and slide down an inclined plane making an angle of 23.0 deg. to the horizontal. find the magnitude of the heavier block's acceleration
Calculate how much power is needed to push a 91 kilogram chest at 0.67 m/s along a horizontal floor where the coefficient of friction is 0.78
a spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. the inner sphere
An electric motor contains a 250-turn circular coil 5.8cm in diameter. If it is to develop a maximum torque of 1.6Nm at a current of 4.0 A, what should be the magnetic field strength
A hollow cubical box is 4.09 m on an edge. This box is floating in a lake with one-third of its height beneath the surface. What is the depth of the water in the box at the instant the box begins to sink
a a spring is hanging vertically from the ceiling at rest. you attach a 0.2 kg mass to it which stretches the spring by
A penny of mass 3.1g rests on a small 20g block supported by a spinning disk. The coefficients of friction between the block and disk are 0.75 (static) and 0.64 (kinetic).
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