Author Question: A ball thrown upwards reaches a maximum height and then comes back down to the original level. When ... (Read 120 times)

kaid0807 · **on:** Jul 28, 2018

A ball thrown upwards reaches a maximum height and then comes back down to the original level. When a body moves in circular motion at constant speed
a. the velocity and acceleration point in the same direction
b. the velocity and acceleration point in opposite directions
c. the velocity and acceleration point perpendicular to each other
d. the acceleration is zero
e. none of the above

Question 2

What determines the smallest angular separation that two objects can have and, ideally, show up in a photograph as two separate objects?
a. How far away the objects are.
b. The shutter speed of the camera.
c. The size of the opening that lets the light into the camera lens and the wavelength of the light.
d. Just the wavelength of the light.
e. Just the size of the opening that lets in the light into the camera.