We have that the momentum p is given by the formula p=mv where m is the mass and v is the velocity. Since for A p=-14kgm/s and m=7, we have that the velocity is -14/7=-2m/s. Hence its speed is 2 m/s.
For b we have that p=15kgm/s and v=3m/s. Because m=p/v, we have m=3kg.
We also have that the momentum is conserved in this system. Hence, the net sum of the momentum of the 2 snowballs equals the momentum of the single giant ball. Hence, p(total)=p(combined)=-14+15=1kgm/s (momentum is a vector; the positive sign means that it tends to the positive direction).
Answer:the paper clip will be attracted to the magnet
Explanation:
Complete question is;
Marie observed people at a store. Which is a qualitative observation she may have made?
A. Twenty people walked into the store.
B. The store sells clothes.
C. It was 1:00 P.M.
D. all of the above
Answer:
Option B:The store sells clothes.
Explanation:
We want to find the one that is a qualitative observation;
Looking at the options;
A. Twenty people walked into the store. This denotes a quantitative measure because of the number 20.
B. The store sells clothes. This denotes a qualitative measure because it describes what she sells.
C. This is a quantitative measure because it deals with time of 1 pm which is quantitative.
Therefore, the correct answer is Option B
Answer:
20 N exerts no torque about the pivot.
14 N exerts a counterclockwise torque of 14 * .3 = .42 N-m
6 exerts a clockwise torque of 6 * .7 = .42 N-m
The meter stick will not turn because there is no net torque on the meter stick.
