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Jane's mass is 20 kg. She starts from rest at the top of a 5 m tall slide and reaches a velocity of 5 m/s at the bottom of the slide. What is the change in thermal energy of the Lily/earth/slide sy
A peg is located a distance h directly below the point of attachment of the cord. If h = 0.70 L, what will be the speed of the ball when it reaches the top of its circular path about the peg? (Use t
Megan's mass is 26 kg. She starts from rest at the top of a 4.8 m tall slide and reaches a velocity of 5.1 m/s at the bottom of the slide. What is the change in thermal energy of the Megan/earth/sl
Two small spheres spaced 40.0 cm apart have an equal charge. How many excess electrongs must be present on each sphere if the magnitude of the force of repulsion between them is 5.37x 10^-21 newton
A force stretches a wire by 0.60mm. A third wire of the same material has the same length and twice the diameter as the first. How far will it be stretched by the same force?
A converging lens (f = 13.0 cm) is held 7.30 cm in front of a newspaper, the print size of which has a height of 1.90 mm. Find (a) the image distance (in cm) and (b) the height (in mm) of the magni
Two ants race across a table 76 cm long. One travels at 4.6 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one?
The total electric flux from a cubical box 28cm on a side is 1.45*10^3 Nm^2/C. What charge is enclosed by the box?
A car is traveling at 24 m/s when the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.3 m/s2, does she manage to stop b
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval should the gyroscope be operated?
An airplane flying horizontally 3600 ft above the ground at 120mi/hh, drops relief aid on the ground. Determine the angle between the vertical and the line joining the plane and the target at the i
A flat circular mirror of radius 0.190 m is lying on the floor. Centered above the mirror, at a height of 0.770 m, is a light source. Calculate the diameter of the bright circular spot formed on th
A dog trots 3.6 meters east and 5.0 meters north. What are the magnitude and direction of the dog's displacement with respect to the original position?
An 8.50 point mass and a 13.0 point mass are held in place 50.0 apart. A particle of mass is released from a point between the two masses 20.0 from the 8.50 mass along the line connecting the two f
A racing car travels in a circular track of radius 250 m. lf the car moves with a constant linear speed of 45.0 m/s;find (a) its angular speed and (b) the magnitude and direction of its acceleration.
A 96.0 N grocery cart is pushed 10.9 m along an aisle by a shopper who exerts a constant horizontal force of 36.2 N. The acceleration of gravity is 9.81 m/s2. If all frictional forces are neglected
How many revolutions per second would it have to rotate in order that the acceleration of the outer edge of the disk be 17 g's.
The increase in pressure in the blood vessel is transmitted to the cerebrospinal fuid. What should be the normal effect on the height of the fluid in the spinal tap?
A potter's wheel having a radius 0.45 m and a moment of inertia 10.7 kg·m2 is rotating freely at 50 rev/min. The potter can stop the wheel in 5.0 s by pressing a wet rag against the rim and
An explorer is caught in a whiteout while returning to base camp.He was supposed to travel due north for 5.6km, but he actually traveled 7.8km at 50 degrees north due east.
To not slip, both cars need to maintain a net force of as they travel around the curve. How does the speed of the small car compare to the speed of the large car as they round the curve?
A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is mus= 0.320, and the coefficient of kinetic friction is muk= 0.190. The angle of elevatio
In the deep ocean, a water wave with wavelength 95m travels at 12m/s. Suppose a small boat is at the crest of this wave, 1.7m above the equilibrium position. What will be the vertical position of t
A child's toy consists of a piece of plastic attached to a spring, as shown below. The spring is compressed against the floor a distance 2.5 cm and released. If the spring constant is 119 N/m, what
Tarzan swings on a 23.2 m long vine initially inclined at an angle of 35° from the vertical. What is his speed at the bottom of the swing if he starts from rest?