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1.Refer to the graph and answer the following questions:
· When does the object have a positive acceleration?
· When does the object have a negative acceleration?
· Graph the position and acceleration curves. Assume the object starts at so = 0 m
2. A frictionless cart with a person in it is released from rest at the top of an inclined plane. The plane is inclined 30o. Find the distance the cart travels in 3 seconds. Show the graph for position, velocity and acceleration.
3. Consider the same scenario as question 2. After 5 seconds have passed, a safety mechanism is activated by the person in the cart. This mechanism slows down the cart until a complete stop. The brakes on the cart provide a deceleration of 6.9?? when ??2 the cart is not on an inclined surface. Calculate the necessary distance for the cart to come to a complete stop and the total distance the cart traveled. Show the graph from the moment the cart was released until it came to a complete stop.
The masses of the javelin, discus, and shot are 0.80 kg, 2.0kg, and 7.2 kg, respectively, estimate the average force exerted on each object during the throw
A 4.4-m-tall, 30-cm-diameter concrete column supports a 5.0×105kg load. By how much is the column compressed
An X-ray tube gives electrons, which start at rest, a constant acceleration over a distance of 23cm. If their final speed is 1.3 x 107 m/s, what are the time they spend accelerating
If 15 g of radon gas with a half-life of 4 days is present in a balloon at t = 0, what is the mass of radon gas present
A double concanve lens has equal radii of curvature 15.1 cm. What is the index of refraction of the lens material
A firm wants to calculate the amount of frictional torque in their current line of grindstones; therefore they can redesign them to be more energy efficient. Find what is the frictional torque exerted on the grindstone
consider a 10 g sample of enriched uranium containing initially 15 wo in u235 and the rest is u238 that is exposed in a
A 100-g piece of metal initially at 100 C is placed in a 250 gof water contained in a 300-g aluminum vessel initially at 20.o C. what is the specific heat of the unknown piece of metal
question power plant that uses the temperature gradient of the ocean has been proposed. the system is to operate
A visual binary system is at a distance of 5.0 pc. The distance between the two stars subtends an angle of 4.5 arcseconds. What is the mass of each of the stars
Determine the height of an image for an object that is 5 inched tall. Object is placed 10.0 in from convex mirror and its located -5.00 in from rear of mirror
the concept of thermionic emission is the basis of modern x-ray tubes which are the workhorse of a medical x-ray image.
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