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Physics AP
Test:
Chapters 5 and 6
Form
1
∑
=
a
F
m
N
f
F
F
μ
=
r
v
a
c
2
=
a dx
v dv
=
dx
v
dt
=
dv
a
dt
=
1
1
n
n
A
Ax dx
x
n
+
=
+
∫
(
29
(
29
1
sin
cos
Bt dt
Bt
B
= 
∫
(
29
(
29
1
sin
cos
A
Bt dt
A
Bt
B
+
= 
+
∫
Bx
Bx
A
Ae
dx
e
B
=
∫
(
29
(
29
1
cos
sin
Bt dt
Bt
B
=
∫
(
29
(
29
1
cos
sin
A
Bt dt
A
Bt
B
+
=
+
∫
A child is playing with four blocks, as shown at right.
She
applies a force of 20 N to block A and makes all four blocks
slide to the right.
The coefficient of kinetic friction
between the blocks and the floor is 0.30.
1)
What normal force acts between block B and block C?
A block of length
L
= 2 m and mass
m
= 2 kg is placed on an
inclined plane made up of two distinct surfaces, as shown at
right.
The block initially rests completely on the frictionless
surface with its front edge at
x
= 0, right next to the rough
surface of kinetic friction coefficient
k
= 0.4.
When the block
is released from rest, it slides down the incline so that more
and more of the bar is in contact with the rough surface.
2)
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 Spring '10
 Ramesh
 Physics

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