Answer to Question #296356 in Physics for kazi

Question

1.) A projectile is directed toward the sky with an angle of 45° from the level ground. It reaches a range of 10m in 10s. While in air, the projectile's horizontal acceleration is

a. - 9.81 m/s²

b. +9.81 m/s²

c. + 9.81 m/s²

d. 0

2.) If you launch one at an angle 45 degrees and another at 30 degrees, which angle gives you longer range?

a. both angles give same range

b. 45 degrees

c. 30 degrees

3.) A projectile is given a horizontal velocity. As it moves, its vertical speed

a. decreases

b. increases

c. fluctuates

d. remains constant

4.) For an object in uniform circular motion, what effect would be produced on the magnitude of the centripetal acceleration of the object if the mass of the object triples.

a. Quadruples

b. 1/2 as big

c. No change

d. Doubles

Answer 1

1. Answer: d. 0

2. Answer: b. 45 degrees

3. Answer: b. increases

4. Answer: c. No change