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1. What is the formula used to determine the magnitude of the resultant velocity vector?
B. V= square root of (Vx2 + Vy2)
Q2: What is the relationship between the horizontal and vertical components of velocity in two dimensions?
B. They are independent of each other
Q3: How do you determine the x-component of the resultant velocity vector?
B. By adding the X-components of both velocity vectors
Q6: What is the path a projectile takes called?
A. Trajectory
Q7: What type of graph shows the object's total trajectory?
B. Trajectory graph
Q4: What type of motion is the horizontal component of projectile motion?
A. Uniform motion
Q5: What happens to the velocity in the y-direction during projectile motion?
C. It increases
Q8:What shape does a projectile trajectory follow?
C. Parabola
Q10: What is the equation for vertical motion in projectile motion?
A. Vy = Viy + gt
Q12: What type of motion is described when an object travels in a circular path at a constant speed?
A. Uniform circular motion
Q9: What is the difference between a trajectory graph and a position graph?
B. Position graph shows time on the horizontal axis
Q11: What is the significance of the area under the velocity vs. time graph for horizontal motion?
A. It represents horizontal displacement
Q13: What does the word 'centripetal' mean?
A. Center seeking
Q14: What is the direction of the change in velocity during uniform circular motion?
B. Toward the center
Q15: In which direction does centripetal acceleration act?
B. Toward the center
Q16: A projectile is shoved horizontally off a cliff. Which of the following would cause the projectile to have a farther horizontal displacement before hitting the ground?
A. a greater initial horizontal velocity
Q17: A professional football punter kicks a football with an initial velocity v = (16.0 m/s)x̂ + (23.0m/s)ŷ. Determine the horizontal and maximum vertical displacements.
C. Δx = 75.0 m, Δy = 27.0 m
Q29: The spacecraft designers have decided that the 400-meter-radius spacecraft only needs to produce an acceleration of 0.4g. What speed will produce that acceleration?
V= 39.6 m/s
Q22: At a point in time, the velocity of a boy skateboarding up a ramp, is represented as the components v = (2.4 km/s)x^ + (6.0 km/s)y^. Sketch a vector representation and determine the magnitude of the boy's velocity.
V= 6.64 km/s
Q26: A professional football player kicks a football with an initial velocity v = (6.0 m/s)x^ + (20.0 m/s)y^. Determine how long the football stays in the air, as well as the horizontal displacement.
t= 4.08 s
Δx= 24.48 m
Q27: A friend kicks a soccer ball into the air with an initial velocity v = (9.0 m/s)x^+ (18 m/s)y^. Determine the hang time for the ball and how far away it will land from its initial position.
t= 3.67 s
Δx= 33.03 m
Q28: The spacecraft designers have decided that the 200-meter-radius spacecraft only needs to produce an acceleration of 0.5g. What speed will produce that acceleration?
V= 31.3 m/s