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Dec 6, 2023

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Question 1 1 / 1 pts What forces act on a projectile? gravity and friction the throwing force and gravity only gravity the throwing force, gravity, and friction Question 2 1 / 1 pts What direction(s) do projectiles move by definition? always vertical, sometimes horizontal vertical horizontal and vertical

horizontal Question 3 1 / 1 pts If a projectile's vertical velocity increases, the horizontal velocity decreases is not effected increases Question 4 1 / 1 pts If a projectile is thrown up at an angle, its vertical velocity will increase because of gravity decrease to zero, then start increasing in the opposite direction remain a constant

decrease because of gravity Question 5 1 / 1 pts The vertical acceleration of a projectile is zero because there is no vertical force No answer text provided. is always that of gravity, 9.8 m/s2 Depends on the object's mass Question 6 1 / 1 pts The horizontal acceleration of a projectile No answer text provided. Depends on the object's mass

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is zero because there is not horizontal force is always that of gravity Question 7 1 / 1 pts A Projectile is launched from the ground with an initial horizontal velocity of 40 m/s and an initial vertical velocity of 30 m/s. It lands back on the ground 6 seconds later. How far away from its launch did it land? (assume g=10) 120 90 180 240 Incorrect Question 8 0 / 1 pts

A ball is rolled straight off a cliff with an initial speed of 20 m/s straight horizontal. If it hits the ground 3 seconds later, how far from the cliff does it land? (Hint: what HORIZONTAL DISTANCE is it from the cliff) (Assume g=10) 60 m 30 m 45 m (NOT) 600 m Question 9 1 / 1 pts A Projectile is launched from the ground with an initial horizontal velocity of 40 m/s and an initial vertical velocity of 30 m/s. It lands back on the ground 6 seconds later. How high did it go? (assume g=10) 45 m 180 m 90 m

240 m Incorrect Question 10 0 / 1 pts A ball is rolled straight off a cliff with an initial speed of 20 m/s straight horizontal. If it hits the ground 3 seconds later, what was its vertical velocity when it hit the ground?) (Assume g=10) 40 m/s 60 m/s 20 m/s 30 m/s 50 m/s ( Not) Question 11 1 / 1 pts What is the only thing the horizontal and vertical motion have in common?

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they happen in the same time the same velocity their acceleration the force of gravity

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