# help with one physics question

Anonymous

Question description

2. A student performs a ballistic pendulum experiment using an apparatus similar to that shown in the first figure. She obtains the following average data: h = 8.70 cm, projectile mass m1 = 67.2 g, and pendulum mass m2 = 263 g.

http://www.webassign.net/serpse8/9-p-056.gif

http://www.webassign.net/serpse8/9-p-070.gif

(a) Determine the initial speed v1A of the projectile.

(b) The second part of her experiment is to obtain v1A by firing the same projectile horizontally (with the pendulum removed from the path) and measuring its horizontal position x and distance of fall y, as shown in the second figure. What numerical value does she obtain for v1A on the basis of her measured values of x = 272 cm and y = 92.5 cm?

(c) What factors might account for the difference in this value compared to that obtained in part (a)?

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