2. the 10kg crate as shown in figure 6-51 has an initial velocity of 2 m/s on the inclined plane,
which the coefficient of kinetic friction is 0.3. if a 100n towing force has been applied to the
crate for 8 seconds, calculate the final velocity and the distance of the crate travels during this
time.
u= 2 m/s
f = 100 n
300
figure 6-51
(ans: y=100.848 m/s, s = 411392)

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?