Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 7, Problem 59P
To determine
To evaluate:The speed of comet as it reaches the sun 1 astronomical units from the sun.
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*..33 Go In Fig. 8-46, a spring with
k = 170 N/m is at the top of a fric-
tionless incline of angle e = 37.0°.
%3D
The lower end of the incline is dis-
tance D = 1.00 m from the end of
the spring, which is at its relaxed
length. A 2.00 kg canister is pushed
against the spring until the spring is
compressed 0.200 m and released
from rest. (a) What is the speed of
the canister at the instant the spring
returns to its relaxed length (which is when the canister loses contact
with the spring)? (b) What is the speed of the canister when it
reaches the lower end of the incline?
Figure 8-46 Problem 33.
During World War 2, a military parachutist fell 0.37km from an airplane without being able to open
his chute, but luckily was able to land in snow, suffering only with minor injuries. Assume that his
speed at impact was 56 m/s, and his mass, including his gear was 85kg, and that the magnitude of
force on him from the snow was at the survivable limit of 1.2 x 10^5 N. What is the magnitude of the
impulse on him from the snow?
(Answer in one decimal place, no unit)
Sample answer: 1.1x10^3 (Enter the 1.1 only)
UNIT: kg-m/s
Add your answer
6)
Z.
A thin non-condu cting rod of ma ss m and length L = 60cm, slides frictionl essly at a
constant speed V = 0.5 m/s along the rails placed on the surface and at the edges of
an inclined plane with the effect of an external force. The rails at the edges of the
inclined plane are connected with each other via the rail at the bottom edge of the
plane, so the rod and rails forms a rectangular closed loop as seen in the figure. The
plane of the rails makes an angle 0 = 55° with the horizontal plane (xz plane). Before
sliding, the rod stays at the di stan ce S = 4m measured from the bottom edge of the
inclined plane. The inclined plane and the rod are under the effect of a uniform
magnetic field given by B = 0.40î + 3ĵ + 0.8k(T). After the rod starts to slide, what
will be the magnetic flux passing through the surface formed by the rod, the rails at
the edges, and the rail at the bottom edge of the inclined plane at t=4s?
A) 1.50 Wb B) 7.53 Wb C) 0.083 Wb D) 0.147 Wb E) 1.67 Wb
Chapter 7 Solutions
Physics Fundamentals
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- Jane, whose mass is 50.0 kg, needs to swing across a river (having width D) filled with person-eating crocodiles to save Tarzan from danger. She must swing into a wind exerting constant horizontal force F, on a vine having length L and initially making an angle with the vertical (Fig. P7.81). Take D = 50.0 m, F = 110 N, L = 40.0 m, and = 50.0. (a) With what minimum speed must Jane begin her swing to just make it to the other side? (b) Once the rescue is complete, Tarzan and Jane must swing back across the river. With what minimum speed must they begin their swing? Assume Tarzan has a mass of 80.0 kg.arrow_forwardDuring world war 2, a military parachutist fell 0.37km from an airplane without being able to open his chute, but luckily was able to land in snow, suffering only with minor injuries. Assume that his speed at impact was 56m/s, and his mass, including his gear was 85kg, and that the magnitude of force on him from the snow was at the survivable limit of 1.2 x 10^5 N. What is the magnitude of the impulse on him from the snow? (Answer in one decimal place, no unit) sample answer: 1.1 x 10^3 (enter the 1.1 only)arrow_forwardA sodden block with mass 1.50 kg is placed against a compressed spring at the bottom of an incline of slope 30 degrees (point A). When the spring is released, it projects the block up the incline. At point B, a distance of 6.00 m up the incline from A, the block is moving up the incline at 7.00 m/s and is no longer in contact with the spring. The coefficient of friction between the block and incline is 0.50. Calculate the amount of potential energy that was initially stored in the spring( draw the diagram, calculate the force of friction, Determine the types of energy present at the initial and final position, calculate the spring potential energy.arrow_forward
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