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

1#

94.16: A car of mass m, tr: nva jbg1y)gz1rt6.eaveling at speed v, stops in time t when maximum braki6n1.:tvgrjz ayg1 )ebng force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.04: When the velocity 8ikxck(:w3gw of a moving object is doubled, its_______is also doubledx3ki8ww:kgc ( .

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.06: Impulse, Fnez caey7t1n;7:4rkq o pt $\Delta$tis best related to:

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 mo96urwet:3iakja+q(kp,v2+ykn u l; n st closely associated with the following observation about an isolated obkv :a +n9aeuy3 w;l,u ni k+(pj2qr6tkject: “The linear momentum of the object is constant.”?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.21: The change inrlq, h0vlorhw-yg y1-ie(hxw0snl0g+x *f35 linear momentum of an object is always in the same direction h0x+0r0 l hx 31ryl nlh(,*-weqiwogfyv -s5gas the

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.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.08: How long must n8u gg.xxju u 3a1ut y1r8a1ry+ 5ye+ta 100 N net force act to produce a change in momentum of 200 kg.m/sygx u8t+5r gj.8 yuna 11rxy3u1+utae?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 ml3 q-09 kwsflenergy than P if it: l 093smfkw-lq

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.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 0.50 kg and a speed of 6.0 m/s collides per.:gdowgg4 f qahydn/m m(.; ph bq5g).pendicularly 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 thepy; (:qfg gdgn./.ba.om4qw) gh d5mh ball?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

01.08: A 50 kilogram gymnast falls freely from,j nbh ;44:hu;gr xmhw a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to theb;mhj4x, nw:;h g4ruh speed at which she first struck the trampoline. What is the average force the trampoline applies on the gymnast?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 10l)0 j 4smhwrn7.0 m/s when it has a collision in space. The mass’s speedrj0wh4 nm 7)sl was unchanged, but the direction of its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.13: A bat striking a 0.125 kg-hitvwpo8 ee qw48e 45)baseball is in contact with the ball for a time of 0.03 seconds. The ball travels in a straight line as it a) htw58oe4w qev p4e8ipproaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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.c37,-x r)h a xtlr0utn0 J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-- t rhlx3,0)x7 urnctacomponent of the object’s linear momentum?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.05: At an instant of timcg k npbc/smk9641m( me t, a point object of mass M moves with velocity V, has acceleration a, am gccb4(9 k1knp6/sm mnd is at position (x,y). In what direction must the linear 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

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 downwx o xnrpf8((44wr,ttil;zf/ qard hits the ground with a speed of 0.90 m/s and then rebounds straightn tl otx;4( /4,ifxrrp8 zq(wf 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?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

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 hits the gq7ow(.mge9q31 n nideround with a speed of 0.90 m/s and then rebounds straight upward with a s1odi (qm9nn. 3qgwe7epeed 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 force (in units of Newtons) exerted by the ground on the ball while they are in contact?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 the right across a horih4g ip4a.x wwz:s3ae.cr0a- wzontal surfaa.sxa aehg4p0 3w wwci-4:.rzce while a constant frictional force of 8.0 N acts on the 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?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

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 to the right ac)rz2rt ai ydq0 -pj86cross a horizontal surface. When the box has 12.0 J of kinetic ener) jtzq cp a6-02ri8dyrgy, 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 box at this instant?

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

账号		自动登录	找回密码
密码			立即注册

网页聊天 (离线可收发)

加微信咨询 (申请一对一课程辅导，加本站学习交流群）

电话咨询：

联系管理员：

查看帮助：

未使用图片

本次作答已使用