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A car with an initial velocity of 3.5m/s coasts with the engine off and the transmission in neutral. If the combined effect of air resistance and rolling friction causes a deceleration of 0.50m/s^2, after how long will the car come to rest?
Together, two students exert a force of 640 N in pushing a car a distance of 30 m. How much work do the students do on the car
A horse canters away from its trainer in a straight line, moving 140m away in 18s. It then turns abruptly and gallops halfway back in 4.9s.
A student applies a 20.-newton force to move a crate at a constant speed of 4.0 meters per second across a rough floor
What is the gravitational force between two 20 kg iron balls separated by a distance of 0.5m? The gravitational constant is G = 6.67×10^-11 N-m^2/kg^2
Steel expand 11 pars in million for each 1C change. think about the 1.3-km main span of steel for the Golden Bridge. if the span had no expansion joints, show that the span would be 0.21 m longer for a 15 C increase in temperature.
Gven the relationship between angular frequency and wave number derived from some wave equation, determine whether the system is dispersive or nondispersive
The cable of the 1900 kg elevator cab shown the figure snaps when the cab is at rest at the first floor, where the cab bottom is a distance d = 4.7 m above a spring of spring constant k = 0.18 MN/m. Find the speed of the cab just before it hits the..
A baseball player loosening up his arm before a game tosses a 0.149-kg baseball, Find the constant angular acceleration of the arm and ball
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.605m from the axis of rotation of the stool. What is the initial angular momentum of the system
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
A diatomic gas does 320 J of work and also absorbs 600 cal of heat. What is the change in internal energy of the gas
A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2.
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