accelerated motion

1. The motion of an object with constant acceleration is also known as _______________

• constant motion

• uniform accelerated motion

• motion

• uniform motion

2. What is the magnitude and direction of a_g (acceleration due to gravity)?

• 9.8m/s² upward

• 9.8m/s² downward

• 9.8m/s upward

• 9.8m/s downward

Which of the following statements is TRUE about an object in uniformly accelerated motion?

I. Velocity is constant.

II. Acceleration is not zero.

III. Acceleration changes slowly.

IV. Velocity changes at a constant rate.

• A. I and II

• B. I and III

• C. III and IV

• D. II and IV

. In free fall, the only force acting upon an object is ________.

• A. Friction

• B. Gravity

• C. Unbalanced force

• D. Balanced force

Tags

NGSS.MS-PS2-4

In freefall, the initial velocity of the object is always _____.

• A. Zero

• B. Depends on the problem

• C. No value

• D. It only has final velocity

6. When do we have a negative value of a_g?

• A. If the movement of object is upward

• B. If the movement of object is horizontal

• C. If the movement of object is downward

• D. If the movement of object is sideward

. The motion of an object is constantly accelerating vertically.

• A. horizontal dimension

• B. parallel dimension

• C. vertical dimension

• D. third dimension

For numbers 8 - 9 Mikka is playing with a ball on top of the building but the ball fell and hits the ground after 2.6 s?

What is the final velocity of the ball just before it hits the ground?

• A. -3.76 m/s

• B. -25.48 m/s

• C. -35.88 m/s

• D. -17.65 m/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

9. How high is the building?

• A. 25.48 m

• B. 12.74 m

• C. 66.45 m

• D. 33.12 m

The velocity of ball at highest point when it’s thrown vertically upward is _______.

• A. 9.8 m/s

• B. -9.8 m/s

• C. zero

• D. cannot be determined

Tags

NGSS.HS-PS3-2