Physics help about mass and acceleration please?

Ninja?! xD

New member
1) In Chapter 4, you calculated the braking acceleration for a car based on data in a drivers handbook. The acceleration was -12.2 m/s2. If the car has a mass of 925 kg, find the frictional force and state the direction.
What's the magnitude?

What's the direction?
a) toward the direction of motion
b) perpendicular to the line of motion
c) opposite the direction of motion

2) Suppose you exert a force on a black block and measure its acceleration. You then exert the same force on a brown block. Its acceleration is three times that of the black block.

What can you conclude about the masses of the blocks?
a) The brown block has three times the mass of the black block.
b) The brown block has six times the mass of the black block.
c) The brown block has twice the mass of the black block.
d) The masses of the two blocks are the same.
e) The black block has twice the mass of the brown block.
f) The black block has three times the mass of the brown block.
g) The black block has six times the mass of the brown block.

Thank you so much :)
 
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