Questions Uploads
Question
A centripetal force of 230 N acts on a 2,000-kg satellite moving with a speed of 5,100 m/s in a circular orbit around a planet. What is the radius of its orbit?
Question
Consider the sketch of part of a roller coaster ride below. At position A, the roller coaster will reach its maximum height, at 10m. Assuming there is no energy loss, write down the total energy (TE), potential energy (PE), and kinetic energy (KE) of the roller coaster at positions A, B, C, and D. The mass of the roller coaster is 100kg, and acceleration due to gravity is rounded to be 10m/s2. Discuss the aspects of energy conservation.
shows a roller coaster with a height of
0m up to 10m down to 5m up to 7.5m down to 0
Question
The equation connecting s, p, and f for a simple lens can be employed for spherical mirrors, too. A concave mirror with a focal length of 5 cm
forms an image of a small object placed 13 cm
in front of the mirror. Where will this image be located? (For spherical mirrors, positive p means the image is on the same side of the mirror as the object.)
p = ________ cm
Question
A camera is equipped with a lens with a focal length of 40 cm. When an object 2.5 m (250 cm) away is being photographed, what is the magnification?
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