Post by: folubunmi on Aug 1, 2020
Question 1
Which of the following quantities is directly proportional to the time interval after a projectile has left the barrel that shot it out? The x axis is horizontal; the y axis is vertically upward.
◦
◦
Δay
◦
Δy
◦
◦
Δvy
Question 2
While the gondola is rising at a speed of 2.0 m/s, a passenger in a balloon-supported gondola throws a small ball down at a speed of 5.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
◦
2.0 m/s, up.
◦
3.0 m/s, down.
◦
3.0 m/s, up.
◦
5.0 m/s, down.
◦
12.8 m/s, down.
Post by: trog on Aug 1, 2020
Answer 1
Δvy
Answer 2
3.0 m/s, down.