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An object is projected upwards from the ground, and follows a path as represented in the diagram.
Which of the following describes the projectile’s horizontal and vertical acceleration at point Y?
D
Some students were testing the hypothesis that launching a projectile at an angle of 45° will give the maximum horizontal range.
Which experimental setup will best test the hypothesis?
C
A ball is launched at speed u and angle q from the horizontal as shown. P is the highest point reached by the ball.
Ignoring air resistance, what is the speed of the ball at point P?
C
The horizontal and vertical components of the velocity of a projectile are respectively Vx and Vy .
Which pair of graphs best represents the velocity of the projectile?
B
A baseball is hit with a velocity of 28 m/s^–1 at an angle of 30° to the horizontal at an initial height of 1.0 m above the plate.
Ignore air resistance in your calculations.
(a) How long does it take the ball to return to the initial height above the ground? (3 marks)
(b) The ball is hit directly towards a stationary outfielder who is 85 m from the plate. At the instant the ball is hit, the outfielder begins to run towards the plate with constant acceleration.
What is the magnitude of her acceleration if she catches the ball when it is 0.50 m above the ground? (4 marks)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(a)
(b)