1. Suppose an individual moved from point s1 (6,9) to point s2 (11,10) to point

Question

1. Suppose an individual moved from point s1 (6,9) to point s2 (11,10) to point s3 (5,6). What are the horizontal, vertical, and resultant displacements? A. Horizontal = 11. Vertical =5 ; resultant= 12.1 B. Horizontal = 1. Vertical = 3; resultant= 3.26 C. Horizontal = -1. Vertical = -3; resultant = 3.26 D. Horizontal = -11. Vertical = -5; resultant = 12.1
2. A triple jumper needs a velocity of 9 m/s to make a good jump. If he is accelerating at 1.7 m/s^2, how much time does he need to reach the velocity? A. 4.79 s B. 5.33 s C. 5.18 s D. 5.29 s
3. A vaulter starts from rest and is trying to reach a velocity of 8 m/s at the end of a 15-m runway. How quickly must she accelerate? A. 2.14 m/s^2 B. 1.82 m/s^2 C. 1.9 m/s^2 D. 2.09 m/s^2
4. A sprinter starts from rest and reaches a maximum velocity of 7.4 m/s in 2.5 s. What wars the average acceleration from rest to maximum velocity? A. 3.01 m/s^2 B. 2.94 m/s^2 C. 2.87 m/s^2 D. 2.96 m/s^2
5. A high jumper takes off with a vertical velocity of 4.2 m/s. How long does it take the jumper to reach the peak height of the jump? (g=-9.8 m/s^2) A. 0.86s B.0.79s C. 0.44 s D. 0.37 s 1. Suppose an individual moved from point s1 (6,9) to point s2 (11,10) to point s3 (5,6). What are the horizontal, vertical, and resultant displacements? A. Horizontal = 11. Vertical =5 ; resultant= 12.1 B. Horizontal = 1. Vertical = 3; resultant= 3.26 C. Horizontal = -1. Vertical = -3; resultant = 3.26 D. Horizontal = -11. Vertical = -5; resultant = 12.1
2. A triple jumper needs a velocity of 9 m/s to make a good jump. If he is accelerating at 1.7 m/s^2, how much time does he need to reach the velocity? A. 4.79 s B. 5.33 s C. 5.18 s D. 5.29 s
3. A vaulter starts from rest and is trying to reach a velocity of 8 m/s at the end of a 15-m runway. How quickly must she accelerate? A. 2.14 m/s^2 B. 1.82 m/s^2 C. 1.9 m/s^2 D. 2.09 m/s^2
4. A sprinter starts from rest and reaches a maximum velocity of 7.4 m/s in 2.5 s. What wars the average acceleration from rest to maximum velocity? A. 3.01 m/s^2 B. 2.94 m/s^2 C. 2.87 m/s^2 D. 2.96 m/s^2
5. A high jumper takes off with a vertical velocity of 4.2 m/s. How long does it take the jumper to reach the peak height of the jump? (g=-9.8 m/s^2) A. 0.86s B.0.79s C. 0.44 s D. 0.37 s A. Horizontal = 11. Vertical =5 ; resultant= 12.1 B. Horizontal = 1. Vertical = 3; resultant= 3.26 C. Horizontal = -1. Vertical = -3; resultant = 3.26 D. Horizontal = -11. Vertical = -5; resultant = 12.1
2. A triple jumper needs a velocity of 9 m/s to make a good jump. If he is accelerating at 1.7 m/s^2, how much time does he need to reach the velocity? A. 4.79 s B. 5.33 s C. 5.18 s D. 5.29 s
3. A vaulter starts from rest and is trying to reach a velocity of 8 m/s at the end of a 15-m runway. How quickly must she accelerate? A. 2.14 m/s^2 B. 1.82 m/s^2 C. 1.9 m/s^2 D. 2.09 m/s^2
4. A sprinter starts from rest and reaches a maximum velocity of 7.4 m/s in 2.5 s. What wars the average acceleration from rest to maximum velocity? A. 3.01 m/s^2 B. 2.94 m/s^2 C. 2.87 m/s^2 D. 2.96 m/s^2
5. A high jumper takes off with a vertical velocity of 4.2 m/s. How long does it take the jumper to reach the peak height of the jump? (g=-9.8 m/s^2) A. 0.86s B.0.79s C. 0.44 s D. 0.37 s

Explanation / Answer

1.

Horizontal displacement = final position - intial position

= 5 - 6

= -1

Vertical displacement = final position- initial position

= 6 - 9

= -3

Resultant displacement = sqrt [( -3^2) +( -1^2)]

3.26

Hence option (3) is correct.

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