An eagle is flying horizontally at a speed of 3.00 m/s when the fish in her talo

Question

An eagle is flying horizontally at a speed of 3.00 m/s when the fish in her talons wiggles loose and falls to the ground 5.00 m below. Which is the path of the fish as seen from the ground? A) The correct path is (e). B) The correct path is (d). C. The correct path is (c). D) The correct path is (b). E) The correct path is (a). Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled. A) The displacement is either greater than or equal to the distance traveled. B) The displacement is always equal to the distance traveled. C) The displacement is either less than or equal to the distance traveled. D) The displacement is the distance traveled per elapsed time. A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg rock to reach the ground? A) 4T B) 2T C) T D) T/2 E) T/4 Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct? A) The acceleration is toward the east. B) Since the car is slowing down, its acceleration must be negative. C) The acceleration is zero. D) The acceleration is toward the west. Which of the following statements are true about an object in two-dimensional projectile motion with no air resistance? A) The speed of the object is constant but its velocity is not constant. B) The acceleration of the object is zero at its highest point. C) The acceleration of the object is +g when the object is rising and -g when it is falling. D) The horizontal speed of the object is zero at its highest point. E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward.

Explanation / Answer

I-6)

Along with eagle the fish also has initial horizontal velocity.

This is like a body projected horizontally so it follows parabolic path

Answer is D) the correct path is (b)

I-7)

The distance is the actual path travelled by the body

whereas the displacement is the shortest length between two points

Answer is C) The displacement is either less than or equal to the distance travelled

I-8)

The time of desend of a freely droped object is given by

T = sqrt(2h/g). This shows the time doesnot depend on mass.

Answer is C) T

I-9)

If the velocity increases the acceleration will be in the direction of velocity

If velocity decreases the acceleration will be opposite to acceleration

Answer is A) The acceleration is toward the east

I-10)

In projectile motion the body is only under the influence of the earth gravity

and the aceeleration due to gravity is always towards the earth ( downward )

Also no acceleration in horizontal direction

Answer is

E) The horizontal direction is always zero and the vertical acceleration is always a non-zero constant downward

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