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15
Xs) 2
SECTION TWO
LINEAR DYNAMICS, WORK ENERGY & POWER, SYSTEM OF
PARTICLES, CONSERVATION OF MOMENTUM
8. Okoro and Okafor weigh 70kg and 50kg respectively and push against each
other. If Okoro pushes Okafor by a force of 700N, Okafor has pushed Okoro
with
A. 500N
B. O
C. 700N
D. 250N
totine
Solution
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Correct option
Reason

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.