3) In the graph of velocity with respect to time (v-t graph), the constant acceleration equals A) initial coordinate of

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3) In the graph of velocity with respect to time (v-t graph), the constant acceleration equals
A) initial coordinate of the straight line
B) final coordinate of the straight line
C) averaged coordinate of the straight line
D) slope of the straight line
4) The constant acceleration assumption for the Top Fuel racing car is
A) accurate
B) useful but not accurate
C) completely wrong
D) always correct
5) The free fall is a motion with
A) constant velocity
B) constant acceleration
C) constant position
D) random speed
6) If a ball was thrown upwards vertically, at the maximum height point it has
A) zero acceleration
B) zero velocity
C) maximum velocity
D) zero displacement
7) The g value on the Mars is
A) g=9.81 m/s^2
B) g=3.71 m/s^2
C) g=1.56 m/s^2
D) g=0 m/s^2
8) If a Mars rover wants to land on Mars safely, it needs
A) Free fall
B) Soft landing
C) Speed larger than a bullet
D) orange color
9) What will cause acceleration?
A) only velocity direction change
B) only velocity magnitude change
C) both velocity direction and magnitude changes
D) position change
10) The trajectory of a projectile motion is a
A) straight line
B) parabola
C) circle
D) square
11) Which of the following is NOT a projectile motion?
A) a thrown base ball
B) bouncing ball
C) a free throw (basket ball)
D) air plane take off
12) The motion of a projectile in y-direction is
A) constant motion
B) constant acceleration motion
C) static
D) random motion
13) To reach the maximum height, a projectile should have launch angle of
A) 0 degree
B) 45 degree
C) 90 degree
D) 180 degree
14) To reach the maximum range, a projectile should have launch angle of
A) 0 degree
B) 45 degree
C) 90 degree
D) 180 degree
15) “Frozen rope”is a base ball with
A) small initial velocity
B) large launch angle
C) small launch angle
D) large maximum height
16) The principle, which was found from experiment "shoot the monkey", helps Einstein in his establishment of
A) Classical Physics
B) Special Relativity
C) General Relativity
D) Quantum Mechanics