Ask Experts Questions for FREE Help !
Ask
    ujayantsexy's Avatar
    ujayantsexy Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 13, 2012, 07:34 AM
    Physics questions multi-choice.
    A monkey of mass 20 kg rides on a 40 kg trolley moving with a constant speed of 8 m/s along a horizontal track.If the monkey jumps vertically to grab the overhanging branchof a tree, the speed of the trolley after the monkey has jumped off is :
    a)8
    b)1
    c)4
    d)12
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #2

    Jun 13, 2012, 12:15 PM
    Tell us what you think the answer is, and why, and we'll check it for you. But consider this: in order for the trolley to gain or lose speed in the horizontal direction there must be a force acting on it in the horizontal direction.
    subhan2010's Avatar
    subhan2010 Posts: 39, Reputation: 1
    Junior Member
    		  
    #3

    Jun 14, 2012, 01:45 AM
    I think...
    momentum of monkey=mom. Of trolley
    m1v1=m2v2
    (20)(8)=(40)v2 ( speed of trolley would be same as that of trolley)
    here v2= 4 m/s...
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #4

    Jun 14, 2012, 05:43 AM
    Quote Originally Posted by subhan2010 View Post
    i think....
    momentum of monkey=mom. of trolley
    Not necessarily true, although I like that you're thinking about momentum. What is true is that the sum of the momentums of the monkey + trolley is constant. This leads directly to the answer for this problem.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Accounting (multi-choice question) [ 1 Answers ]

Where sales are £87,000, fixed costs £21,000 and the profit £8,000, the variable cost and the contribution should be: Variable Cost | Contribution A) 58,000 | 29,000 B) 29,000 | 58,000 C) 79,000 | 66,000 D) 66,000 | 79,000 An explanation would also...

Accounting (multi-choice question) [ 3 Answers ]

Hi, I'm not quite sure how to work the following question out, can anyone help with an explanation please? If debtor days are 3 months; debtors at the end of the period are $200,000; the cost of sales ar $600,000 and operating asset turnover is 5 times what is the gross profit to sales ratio?...

Can you with these multple choice questions [ 7 Answers ]

1. In general, revenue is recongnized when: a. Goods are shipped b. It is realized and earned c. It is recorded in the sales journal d. It is received in cash. 2. What is channel stuffing? a. A company records revenue before delivery terms can be arranged. b. A company records revenue on...

View more questions Search