1. Mass = 0.50g/1000 = 0.0005 kg
KE = M*V^2/2 = 0.0005*5^2/2 =
4. MA = 450/150 = 3.0
1. What is the kinetic energy of a 0.50 g insect traveling in a straight line at 5.0m/s?
a. 6.25j
b. 1.25j
c. 5.0j
d. 250j
Is the answer A??
2. Mechanical energy is defined as the sum of which of the following?
a. kinetic, potential and radiant energy
b. kinetic, potential and nuclear energy
c. all forms of kinetic energy
d. kinetic and all forms of potential energy
Is it D?
3. An object that revolves about a single axis at constant speed has
a. centripetal acceleration
b. tangential speed
c. uniform circular motion
d. all of the above
Is it C?
4. A girl pushes a box that has a weight of 450 N up an incline. If the girl exerts a force of 150 N along the incline what is the mechanical advantage of the incline?
a. 0.33
b. 3.0
c. 300
d. 33%
Is it B?
5. Which of the following statements is true according to Pascal's principle?
a. fluids exert equal pressure in all directions
b. slower moving fluids exert less pressure on their surroundings
c. fluids displace a volume equal to twice that of any object placed in them
d. if the pressure is increased at one point in a fluid it must decrease by the same amount in another part of the fluid
Is it A?
Thank you so much!!
1 answer
1 answer