you press a book flat against a vertical wall with your hand, in what directions
ID: 2032018 • Letter: Y
Question
you press a book flat against a vertical wall with your hand, in what directions the hictiuh exerted by the wall on the book? A. out from the wall B. upward 6? D. into the wa of these is correct.rte3 udi smid smsa srtd 1s dmil 913 6 mon) 2gobm aa A car travelingt 57.0 m/on a flat highwsy Trthe doétnicient of fretion berween road and tires on a rainy dayTeeT2o: wnatis them?mum'distarice in wnich the oar will stop? A. 79.6 m B. 93.2 m ?. 107 m D. 98.5 m E. 125 m 8 For the child being pülfed forward on the toboggan in the figure below, which of the following is true of the magnitude of the normat force exerted by the ground on the toboggan? A, less than the total weight B. equal to the total weight C, greater than the total weight 9. Two objects of masses m and ma, with m ma, have equal kinetic energy. How do the magnitudes of their momenta compare? D. not enough information given O. A 0.268-kg volleyball approaches a player horizontally with a speed of 13.3 the ball with her fist and causes the ball to move in the opposite direction with a speed of 21.4 m/s. If the player' s fist is in contact with the ball for 0.0600 s, find the magnitude of the a force exerted on the player's fist versge A. 185 N B. 155 N C. 175 N D. 165 N E. 145 N 11 2. A boy standing at one end of a floeting raft that is stationary relative to the shore walks to the end of the raft, away from the shore. As a consequence, the raft does which of the following? [Hint: Use conservation of momentum.] A. Not enough information B. remains stationary C. moves toward the shore D. moves away from the shoreExplanation / Answer
6)
Ans :- upward
as the friction force act against the motion of the body ,here the motion is due to downward gravitational force in downward direction so the friction force is acting upward.
7)
57 km/h = 15.8333 m/s
v^2 = u^2 + 2as
s = 15.8333^2 / (2*9.81*0.120)
s = 107 m
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