Question

17. Which of the following could you do to increase the impulse at the start of an upward jump?

a. If you increase the time during which the feet apply force of the force plate

b. if you decrease the time during which the feet apply force plate

c. either A or B

d. if you decrease the initial velocity of a jump

18. A horse and rider miss a job in crash into a pedestal. The riders body continues to move in the same direction and the same speed until contact with the horse or the pedestal causes a change in motion. This best exemplifies

a. Newtons first law of motion

b. Wolfes law

c. newtons third law of motion

d. newtons second law of motion

19. pole vaults to a 5.06 m high and falls to the mat. She weighs 636N. What is her potential energy 3 m into the fall? no external forces are applied.

QUESTION 17 Which of the following could you do to increase the impulse at the start of an upward jump! A if you increase the time during which the feet apply force to the force plate if you decrease the time during which your feet apply force to force plate oc. Other Aor might increase impulse D. if you decrease the initial velocity of the jump QUESTION 18 A horse and ridermis jump and crash into a pedestal. The rider's body continues to move in the same direction and some speed until contact with the horse or the pedestal causes a change in motion. This best exemplifies A Newton's ist law of motion Wolffs Law o Newton's law of motion Newto'sind law of motion QUESTION 19 Yelenabayeva po visto 500 migh and to the the weighs 636 N. What is her planter the in? No external forces are applied in the newly not the

Answer 1

Here, (17) Impulse at the start of an upward jump, I = favg. At = mau so, the answer is (a) It you increase the time during which the feet apply force of the force plate. I = ft (18) In this case, The riders body continues to move in the same direction until contact with the hourse, In Newtons ist law of motion, An object in motion remains in motion at a constant speed and in a straight line (const. relocity unless acted upon by an unbalanced force Hence, Answer is (a) Newton's 1st law of motion (19) h= 3m mg = 636N P.EE Now, portential energy (P.E) = mgh = (636) (3) IP. E = 1908 Hence, potential energy is 1908J