Impulse and momentum - 无忧得胜-网上国际课程 (5edu.win)

?作业考试练习?美国物理杯赛(Physics Bowl)?Impulse and momentum

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习题练习：Impulse and momentum

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作者: admin 发布日期: 2024-08-07 16:03 总分: 17分得分: _____________

答题人: 游客未登录开始时间: 24年08月07日 15:54 切换到: 整卷模式

1#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

94.16: A car of mass m, traveling at spe d) 14.cfc y)zdsfoij+6sbz3 yed v, stops in time t when maximum braking force is applied. Assuming the braking force is independefy+s)4ob3sd1)c . iyzfdc z 6jnt of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.04: When the velocity of a moving object is doubled, its____*qzfb 6kuo.7l9 tm.ku___is also doubled6bf9tk*ko lqm 7.uuz ..

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.06: Impulse, Fnet 4 i*dkdb-l zm+04nntaf9d n4a $\Delta$tis best related to:

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.05: Which one of the following choices is most closely associated with z9u;rcl97: huv( et ygthe followingrl 79t; ugvcuz: ey9h( observation about an isolated object: “The linear momentum of the object is constant.”?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.21: The change in linear momentum of an vx3:bm8zp5dmc zz f68;dexg5nf8 o.eobject is always in the same direction as th5ezm xnb :vf;ogcpfd d5.6x8 m8 8ez3ze

A. velocity of the object.

B. displacement of the object.

C. average speed of the object.

D. average velocity of the object.

E. average acceleration of the object.

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.08: How long must a /zwqzc.6r* r2hcwm:6j fhy o6100 N net force act to produce a change in momentum of 200.ohfjzwrzhm6q/cw2r6 6* :yc kg.m/s?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.29: P and Q have the same momentum. Q can have more kinetic energy t /jv p.2wmpyi/han P if . pjm/v/i 2wypit:

A. has more mass than P.

B. has the same mass as P.

C. is moving faster than P.

D. is moving at the same speed as P.

E. None of the above. Q can’t have more kinetic energy than P.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

98.26: A ball with a mass of 0jdem6lw22 bbv/jbr3 8;z gg-r.50 kg and a speed of 6.0 m/s collides perpendicula 2gl j;r wrgdbbez v2-jm/368brly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the ball?

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.08: A 50 kilogram gymnas 085lycc l2rrt m0a+yu rf gi:omtpuh:7j,) 8ut falls freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is the average force the trampoline applies on ylmam gu8rh rl20tcjcy7f ::) r5, toui0u8 +pthe gymnast?

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.27: A 2.0 kg mass moves at 10.0 m/s when it has a collision in space.kce ;ax --/wo w2kk-us The mass’s speed was unchanged, but the direction of its -kce--2wk su;xw /kaovelocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.13: A bat striking a-,u: ld8axz3a,hb qio 5b/qo v8l(xs n 0.125 kg-baseball is in contact with the ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves withvb88n5/:xo au ia3so qbd,lqzh-,xl ( a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.43: An object of mass 4.0 g has atotal kinetic energy of 100.0 J audf upf(ahm:,) (x+l fv,pp-und an x-component of linear momentum equal to 24.0 kg.m/s:du,(u(+ v ,plxhmu apf)f- pf. The object is moving in the x-y plane. What is they-component of the object’s linear momentum?

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.05: At an instant of time t, a point object of mass M moves with velocity V, 1b t.x0f:8 it9k xmpt n(n.*cos4fkod has acceleration a, and is at position (x,y). In what direction must the lcf1i:ft9*.dpk (o8 ns.btnx x0 k t4moinear momentum of the object be directed at this instant?

A. Along the direction of the velocity of the mass

B. Along the direction of the net force acting on the mass

C. Along the direction of the vector from the origin (0,0) to (x,y)

D. Along the direction of the acceleration of the mass

E. Along the direction perpendicular to the object’s acceleration

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.32: A rubber ball of mass 2.0 kg falling straight downward hits the gy lii95)yq zwwg ++-m-oqf n:dround with a speed of 0.90 m/s and then rebounds stq gio5w+ ql y fd-iw:yz+n)-9mraight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.33: A rubber ball of mass 2.0 kg falling straight downward h)w( f ,secgk/lits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collis(, cl k/sgwf)eion time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.12: A box of mass 5.0 kg is being pushed to th hpw/h3wtya /kg/5z4we right across a horizontal surface while a constant frictional force of 8.0 N acts on thew y wtpwk /hhagz4/53/ box. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

15.12: A box of mass 12.0 kg is being pushed t0kk.zgj;o-. b+xg mkson( : rdo the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the b:j0k(gmko rz.sknbd.;gx -+ oox at this instant?

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总分:17分及格:10.2分时间:不限时

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