Breaking down energy into food
Answer:
a. Yes, because the acceleration of the crate is 2.0 m/s².
Explanation:
Given
--- f
--- m
--- t
--- v
Required
Does the system support 
Yes, it does and this is shown below
The crate is initially at rest; so:

Using the first equation of motion

Substitute values for v, u and t


Make a the subject


Using 
Substitute values for F and m

Divide both sides by 3



In both cases:

<em>Hence, option (a) is correct.</em>
Answer:
c) 2 blocks
Explanation:
Her displacement is the difference between her starting point and her ending point.
Let's say she starts at the origin, (0, 0).
First, she goes 13 blocks east: (13, 0)
Next, she goes 4 blocks north: (13, 4)
Then she goes 8 blocks west: (5, 4)
Then she goes 6 blocks south: (5, -2)
Finally, she goes 5 blocks west: (0, -2)
The magnitude of her displacement is the distance between her initial and final positions: 2 blocks.
Answer:
C
Explanation:
Horizontal is constant... if it was on x axis it would be a speed of 0
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