A player kicks a soccer ball in a high arc toward the opponent's goal. At the highest point in its trajectory

A) both the velocity and the acceleration of the soccer ball are zero.
B) neither the ball's velocity nor its acceleration are zero.
C) the ball's acceleration is zero but its velocity is not zero.
D) the ball's acceleration points upward.
E) the ball's velocity points downward.


B

Physics & Space Science

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An atom gained an electron. Therefore, it has been ionized

a. True b. False Indicate whether the statement is true or false

Physics & Space Science

The look-back time is

a. the time it takes for the light from an object to reach Earth. b. numerically equal to the distance in light-years. c. smaller for more distant objects. d. All of the other choices are correct. e. the time it takes for the light from an object to reach Earth and numerically equal to the distance in light-years.

Physics & Space Science

A cylindrical tank is assembled by welding steel sections circumferentially. Tank diameter is 1.5 m, thick- ness is 20 mm, and internal pressure is 2.0 MPa. The maximum tensile stress in the cylindrical part of the tank is approximately:

(A) 45 MPa
(B) 57 MPa
(C) 62 MPa
(D) 75 MPa

Physics & Space Science

If M = 6.0 kg, what is the tension in string 1?



a.
39 N

b.
34 N

c.
29 N

d.
44 N

e.
51 N

Physics & Space Science