1. Which force opposes motion between two surfaces in direct contact? A. Inertia B. friction C. acceleration

3. You push a sofa, but you can't get it to move by yourself. Why?
A. You have more inertia than the sofa
B. There is no inertia because the sofa is not
C. The sofa's inertia is greater than your applied force.

1. C

2. C

Explanation:

1 is like running your socks on the carpet it creates friction.

2. is because the force you have by yourself is less than the sofas

would be false hope this out

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft