A hot air balloon is moving at a speed of 10 meters/second in the +x direction. The balloonist throws a brass ball with a velocity of -2

Question

A hot air balloon is moving at a speed of 10 meters/second in the +x direction. The balloonist throws a brass ball with a velocity of -2
meters/second with respect to himself. If the ball lands after 20 seconds, about how far does it land horizontally from the point at which it was
released?
OA 98 meters
OB. 160 meters
OC. 196 meters
OD. 420 meters

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Trung Dũng 4 years 2021-07-16T23:35:15+00:00 1 Answers 29 views 0

Answers ( )

  1. yenoanh
    0
    2021-07-16T23:37:02+00:00
    Reply

    Answer:

    160 meters

    Relative of speed Vr = 10 -2 = 8 m/s    (horizontal speed)

    20 sec * 8 m/s = 160 m      since ball travels 20 sec

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )