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1. A child sits on the edge of a spinning merry-go-round that has a radius of 1.7 m. The child's speed is 5 m/s. What is the child's acceleration?2.During a NASCAR race a car goes 48 m/s around a curved section of track that has a radius of 240 m. What is the car's acceleration?3.Initially stationary (the train starts at rest), a train has a constant acceleration of 0.8 m/s2.(a) What is its speed after 33 s?(b) What would be the total time it would take to reach a speed of 44 m/s?4.A rock is dropped off the side of a bridge and hits the water below 8.3 s later.(a) What was the rock's velocity when it hit the water?speed direction (b) What was the rock's average velocity as it fell?speed direction (c) What is the height of the bridge above the water?5.During takeoff, an airplane goes from 0 to 76 m/s in 7 s.(a) What is its acceleration?(b) How fast is it going after 3 s?(c) How far has it traveled by the time it reaches 76 m/s?6.A high-performance sports car can go from 0 to 100 mph in 4.6 s. (Assume the car travels in the positive direction. Indicate the direction with the sign of your answer.)(a) What is the car's average acceleration (in SI units; meter-kilogram-second)?(b) The same car can come to a complete stop from 35 m/s in 5.5 s. What is its average acceleration?7.A passenger jet flies from one airport to another 1,333 miles away in 3.1 h. Find its average speed in the mks system of units.
light of wavelength 558.0 nm is incident on a narrow slit. the diffraction pattern is viewed on a screen 78.5 cm from
A 3.06 kg block slides down a frictionless plane inclined 18.6' to the horizontal. If length of the plane's surface is 1.43 m, how much work is done, and by what force.
A 78kg astronaut is floating in space, he throws a 600 gram wrench at 20 m/s in the direction away from the space station so that he can begin floating towards space. How fast will he be traveling?
a test rocket is launched by accelerating it along a 200.0 m incline at 1.78 ms2 starting from rest at point a. the
Gas is contained in an 6.5 L vessel at a temperature of 20°C and a pressure of 7.4 atm. Determine the number of moles of gas in the vessel
a 5.00 kg wood cube rests on a frictionless horizontal table. it has two springs attached to it on opposite faces. the
Superheated water vapor initially at 15 bar and 440°C is cooled at constant pressure to a saturated vapor state and is then cooled at constant volume to a final temperature of 120°C, Determine the quality of the water at the final state
If one cooks rice on top of a mountain, it takes a longer time for the rice to cook than that it takes at sea level. Discuss this in terms of boiling point, phase changes etc
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration in a distance of 28 m.
The tip of a scanning electron microscope has a radius ofcurvature of 5 nm, and is at a potential of 3V. estimate the electric field at its surface
Charge of uniform density (80 nC/m^3) is distributed throughout a hollow cylinder region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry..
PRACTICE IT Use the worked example above to help you solve this problem. A proton is released from rest at x = ?2.00 cm in a constant electric field with magnitude 1.50 103 N/C pointing in the positive x-direction. (a) Assuming an initial speed of..
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