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On a cold winter's morning a child sits on a sled resting on smooth ice. When the 9.75-kg sled is pulled with a horizontal force of 44.0 N it begins to move with an acceleration of 2.98 m/s2. The 23.0-kg child accelerates too, but with a smaller acceleration than that of the sled. Thus, the child moves forward relative to the ice, but slides backward relative to the sled. Find the acceleration of the child relative to the ice.
A hospital orderly pushes horizontally on two boxes of equipment ona rough horizontal floor, as show in figure 4.38. Make a free-bodydiagram of each box if the force applied to the 50lb boxis 115N and each box experiences frictional forces of 8.2N.
What is a density of the block
An electron moves through an electric field, and its speed drops from 2200m/s to 1000m/s, what's the potential difference between the points at which the speed was measured
A cylinder is inscribed in a right circular cone of height 2.5, What are the dimensions of such a cylinder which has maximum volume
A parallel-plate capacitor has plate area 2.5×10?3m2 and plate spacing 3.0×10?2m, Find the stored charge and energy when this capacitor is connected across a 60V battery
A long solenoid, with its axis along the x axis, consists of 180 turns per meter of wire that carries a steady current of 15.0 A. A coil is formed by wrapping 30 turns of thin wire around a circular frame that has a radius of 7.00 cm. The coil is ..
a 30 kg block on a frictionless surface experiences two perpendicular forces in the x and y directions. if the force in
estimate the average power output on the way up. A speedboat moving at 39 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of -3.15m/s2 by reducing the throttle.
A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
A heat pump (a heat engine run backwards) extracts energy from cold air outside (-5.00 degrees celsius), Determine the amount of heat added to the inside air per joule of work done by the motor
With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 36 m
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