Physics Module 3

The horizontal and vertical components of two-dimensional motion are <blank> of each other.

• True

• False

The motion of an object thrown or projected into the air, subject to only the acceleration of gravity.

Tags

NGSS.HS-PS2-4

Suppose a large rock is ejected from the volcano with a speed of 25.0 m/s and at an angle 35.0° above the horizontal. The rock strikes the side of the volcano at an altitude 20.0 m lower than its starting point. Calculate the time it takes the rock to follow this path.

• -1.03 s

• 3.96 s and/or 1.03 s

• 3.96 s

• 1.03 s

The maximum horizontal distance that a projectile travels.

• Range

• Trajectory

• Relativity

• Resultant

Suppose you walk 18.0 m straight west and then 25.0 m straight north. How far are you from your starting point?

• 31 m

• 30. 8 m

• 30.7 m

• 30.5 m

A new landowner has a triangular piece of flat land she wishes to fence. Starting at the west corner, she measures the first side to be 80.0 m long and the next to be 105 m. What would be the value of the vector C ?

• 92.2 m, 53.4° N of E

• 100 m, 52.4° N of E

• 92 m, 52° S of W

• 92.2 m, 50° N of E

A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0° above the horizontal. It strikes a target above the ground 3.00 seconds later. What are the x and y distances (respectively) from where the projectile was launched?

• 130 m and 30.9 m

• 129 m and 30.9 m

• 130 m and 30.8 m

• 129 m and 30.8 m

A rugby player passes the ball 7.00 m across the field, where it is caught at the same height as it left his hands. At what angle was the ball thrown if its initial speed was 12.0 m/s? Assume that the smaller of the two possible angles was used.

• 15.0°

• 14.2°

• 76.0°

• 75.9°

The path of a projectile through the air.

Tags

NGSS.HS-PS2-4