quiz 5

Neglecting the effect of air resistance, which of the following is/are true regarding the horizontal component of projectile velocity? a) remains constant throughout flight b) changes according to gravitational acceleration equal to 0 c) it both remains constant throughout the flight and d d) changes according to gravitational acceleration

a

Which of the following components of projectile is affected by gravity? a) vertical component b) horizontal component c) both a vertical and a horizontal component d) depends on the individual situation

a

Which of the following represents vertical acceleration of a projectile? a) -9.81 m/s2 b) -9.81 m/s c) 0 m/s2 d) 0 m/s

a

A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be what? a) 10 m/s b) less than 10 m/s c) greater than 10 m/s d) not possible to predict

c

Which of the following is an example of projectile motion? a) a badminton shuttlecock during flight b) a long jumper while in the air c) both a badminton shuttlecock during flight and a long jumper while in the air d) none of the choices are examples of projectile motion

c

Which of the following represents horizontal acceleration of a projectile? a) -9.81 m/s2 b) -9.81 m/s c) 0 m/s2 d) 0 m/s

c

A sprinter starts from rest and reaches a maximum velocity of 7.4 m/s in 2.5 s. What was his average acceleration from rest to maximum velocity? a) 3.01 m/s2 b) 2.94 m/s2 c) 2.87 m/s2 d) 2.96 m/s2

d

Once a projectile is airborne, it is affected by which of the following? a) gravity b) air resistance c) release velocity d) both gravity and air resistance e) all of the choices are correct

d

Which of the following is/are true regarding the apex in the trajectory of a projectile? a) it is the highest point in the flight b) vertical velocity is 0 c) direction changes d) it is both the highest pointing the flight and the vertical velocity is 0 e) all of the choices are correct

e