Homework nr. 2 -
Due Tuesday, Oct. 19
1. (2 points) Write these values with the right prefixes:
0.008 m =
1.2 x 106 ) =
2. A block of 700 g is pulled from rest on a horizontal frictionless bench by a steady force Fand
travels 7.0 m in 3.5 s.
a) (2 points) What was the acceleration of the block?
b) (2 points) Calculate the value of the force.
3. A rocket has a mass of 900 kg.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west