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- Multiple ChoicePlease save your changes before editing any questions.
As the angle between this vector

and the horizontal axis is increased

from 15 to 90 degrees, what happens

to the magnitude of its vertical component?

Increases

Decreases

Stays the Same

- Multiple ChoicePlease save your changes before editing any questions.
Which pair of forces could produce

a resultant of 8 N?

10 N and 19 N

6 N and 1 N

10 N and 15 N

24 N and 33 N

- Multiple ChoicePlease save your changes before editing any questions.
Find the magnitude and direction of the

equilibrant for the following system of forces.

(Remember the equilibrant is the force that brings the system into equilibrium)

20 N northeast

20 N southwest

28.28 N northeast

28.28 N southwest

- Multiple ChoicePlease save your changes before editing any questions.
The picture shows three horizontally launched projectiles. All of the objects are launched from the same height at the same time but with different velocities. Which horizontally launched projectile lands first?

The projectile which is launched at speed v1

The projectile which is launched at speed v2

The projectile which is launched at speed v3

All three projectiles land at the same time

- Multiple ChoicePlease save your changes before editing any questions.
A lucky penny is tossed horizontally

with a velocity of 15 m/s from a

height of 100. m above the ground.

How long will it take the penny to hit

the ground?

1.5 s

2.5 s

4.5 s

20.5 s

- Multiple ChoicePlease save your changes before editing any questions.
A cannon ball is launched horizontally off a cliff with a velocity of 4 m/s. The cliff is 20 m high. Approximately how far from the base of the cliff, does the cannon ball land?

2 m

4 m

6 m

8 m

- Multiple ChoicePlease save your changes before editing any questions.
At what angle from the horizontal

must a projectile be launched in

order to achieve the greatest range?

30 degrees

45 degrees

60 degrees

90 degrees

- Multiple ChoicePlease save your changes before editing any questions.
At what angle from the horizontal

must a projectile be launched in

order to achieve the maximum

flight time?

30 degrees

45 degrees

60 degrees

90 degrees

- Multiple ChoicePlease save your changes before editing any questions.
How does the maximum altitude and

horizontal distance of a projectile change as the launch angle is increased from 30 to 45

degrees?

Both the horizontal distance traveled and the maximum altitude reached will increase

Both the horizontal distance traveled and the maximum altitude will decrease

The projectile will travel a greater horizontal distance but the maximum altitude it reaches will decrease

The projectile will travel a shorter horizontal distance but the maximum altitude it reaches will increase

- Multiple ChoicePlease save your changes before editing any questions.
Calculate the component of the box's weight parallel to the incline if it has a mass of 2 kg and ɵ= 30 degrees

4.9 N

9.8 N

17 N

19.6 N

- Multiple ChoicePlease save your changes before editing any questions.
What is the normal force acting on box

if ɵ= 40 degrees and the mass of the box

is 3 kg?

3 N

18.9 N

22.5 N

29.4 N

- Multiple ChoicePlease save your changes before editing any questions.
Look at forces B and C in the picture. What is the direction of the resultant that these forces produce?

Northeast

Northwest

Southeast

Southwest

- Multiple ChoicePlease save your changes before editing any questions.
An air powered rocket is fired at an initial velocity of 50 m/s at an angle of 60 degrees. Find the horizontal component vx and the vertical component vy of its initial velocity.

vx=25 m/s AND vy=43 m/s

vx=43 m/s AND vy=25 m/s

vx=50 m/s AND vy= 0m/s

vx=35 m/s AND vy=35 m/s

- Multiple ChoicePlease save your changes before editing any questions.
Two vectors will produce the maximum resultant when the angle between the vectors is

0 degrees

45 degrees

90 degrees

180 degrees

- Multiple ChoicePlease save your changes before editing any questions.
A stone is thrown at an angle and travels as shown in the picture. Assuming there is no air resistance, which of the following statements regarding the projectile is true?

The stone's vertical velocity is constant

The stone's vertical velocity increases as it rises and decreases as it falls

The stone's horizontal velocity is constant

The stone's horizontal velocity decreases as it rises and increases as it falls

- Multiple ChoicePlease save your changes before editing any questions.
A ball tied to a string moves in a counterclockwise circle. Which vector represents the instantaneous velocity of the ball at the position shown?

1

2

3

4

- Multiple ChoicePlease save your changes before editing any questions.
What is the centripetal acceleration of a car that moves at 20 m/s in a circle with a radius of 10 m?

2 m

20 m

40 m

80 m