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Q. The small piston of a hydraulic lift has a cross-sectional area of 3.00 cm2, and its large piston has a cross-sectional area of 200 cm2. What force must be applied to the small piston for the lift to raise a load of 15.0 kN
Q. A force of 55.0 N is required to pull a 45.0 kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden black across the same glass surface on the planet Jupiter?
A young woman buys a sports car that can accelerate at the rate of 5.47m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.47s before Kathy. Stan ..
The horizontal component Fx is shown by the histogram below as function of position along x-axis. There is also a kinetic frictional force of 0.50 N between mass and surface.
The G string of a guitar which should be 397 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is necessary so as to tune the string to 392 Hz.
An astronaut on the Mars attaches a small brass ball to a 1.00- length of string and makes a simple pendulum. She times 13 complete swings in a time of 35.4 seconds. From this measurement she calculates the acceleration due to gravity on the Mars.
Heat is extracted from a certain quantity of steam at 100 degrees celsius. Thus the steam changes into ice at 0 degrees celsius. If this energy were used to accelerate the ice from rest, what would be the linear speed of the ice.
A meter long 1.0 cm diameter nichrome heater wire is associated to a 12V battery. What is the magnetic field strength 1.0 cm away from the wire.
A professor walks in a long hall carrying a vibrating 512Hz tuning fork. The end of the hall is closed so that sound reflects from it. The student hears 4 beats per second. How fast is the student walking and in what direction.
Uniform rate of acceleration
A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block and the desk is 0.41. Find out the minimum horizontal force required to move the block if the following occurs.
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
A manager of a restaurant pushes horizontally with a force of magnitude 150 N on a box of melons. The box moves across the floor with a constant acceleration in the same direction as the applied force.
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