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5/36 MCQs for:

Kinematics in Two Dimensions: Vectors, projectiles

A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location of the plane will

Depend on the speed of the plane when the bomb was released.

Be in front of the bomb.

Be over the bomb.

Be behind the bomb.

A butterfly moves with a speed of 12.0 m/s. The x component of its velocity is 8.00 m/s. The angle between the direction of its motion and the x axis must be

41.80.

48.20.

53.00.

30.00.

A projectile is launched with an initial velocity of 60.0 m/s at an angle of 30.00 above the horizontal. How far does it travel?

152 m.

160 m.

184 m.

318 m.

At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?

300

600.

450.

00.

A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 480 m. How fast can she swim in still water?

1.2 m/s.

1.4 m/s.

0.50 m/s.

1.8 m/s.