College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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11.
9.
10.
7.
8.
Find the dot product between a force of 450 N directed at 20° north of east and a
displacement of 15 m to the north.
If a 2.5 kg object falls from a height of 2.0 m it will have a kinetic energy of
50 J just before it hits the ground. If the same object falls from a height of 4.0 m above
the ground, the kinetic energy it has just before hitting the ground will be
K2.0
a) 50 J
b) 71 J
c) 100 J
d) 200 J
In the same situations as the previous question, if the time for the object to fall
from a height of 2.0 m is t2.0, then the time to fall from a height of 4.0 m will be
da
b) t4.0 = t2.0
a) t4.0 = √2t2.0
c) t4.0 = 2t2.0
1) +
d) t4.0
AVTOM
as
A spring attached to the ceiling has a large bucket hanging from it. When the
bucket is empty, the handle of the bucket ends up 0.60 m from the ceiling. A 10kg pumpkin
is put in the bucket which stretches the spring. The handle of the bucket ends up 1.6 m from
the ceiling when the system comes to rest.
=
apballgo sull
A 570 g cart has really good wheels
and is placed on a ramp that makes an angle of
24° with the horizontal. A string is tied from
one end of the cart to the top of the ramp,
and the string is parallel to the ramp. (See
the image to the right.)
(a) Draw a free body diagram for the pumpkin once it has come to rest in this situation and
label the size of the forces.
(b) How far from the co
ceiling will the bucket handle be when a 15 kg pumpkin is placed in
the bucket instead of a 10 kg one?
How much tension will there be in the string
when the cart is sitting motionless on the
ramp?
tension T
=
m
4. t2.0
0
VA
Si bil qabulbnou
expand button
Transcribed Image Text:11. 9. 10. 7. 8. Find the dot product between a force of 450 N directed at 20° north of east and a displacement of 15 m to the north. If a 2.5 kg object falls from a height of 2.0 m it will have a kinetic energy of 50 J just before it hits the ground. If the same object falls from a height of 4.0 m above the ground, the kinetic energy it has just before hitting the ground will be K2.0 a) 50 J b) 71 J c) 100 J d) 200 J In the same situations as the previous question, if the time for the object to fall from a height of 2.0 m is t2.0, then the time to fall from a height of 4.0 m will be da b) t4.0 = t2.0 a) t4.0 = √2t2.0 c) t4.0 = 2t2.0 1) + d) t4.0 AVTOM as A spring attached to the ceiling has a large bucket hanging from it. When the bucket is empty, the handle of the bucket ends up 0.60 m from the ceiling. A 10kg pumpkin is put in the bucket which stretches the spring. The handle of the bucket ends up 1.6 m from the ceiling when the system comes to rest. = apballgo sull A 570 g cart has really good wheels and is placed on a ramp that makes an angle of 24° with the horizontal. A string is tied from one end of the cart to the top of the ramp, and the string is parallel to the ramp. (See the image to the right.) (a) Draw a free body diagram for the pumpkin once it has come to rest in this situation and label the size of the forces. (b) How far from the co ceiling will the bucket handle be when a 15 kg pumpkin is placed in the bucket instead of a 10 kg one? How much tension will there be in the string when the cart is sitting motionless on the ramp? tension T = m 4. t2.0 0 VA Si bil qabulbnou
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