1. Indicate whether the sentence or statement is true or false. If false, modify it into true. (a) The normal force FN that acts on an object is never equal in magnitude and opposite in direction to the gravitational force that is acting on it. (b) An object experiencing a net force of zero is either not moving or moving at a constant velocity. (c) A projectile has both a horizontal and vertical component to its acceleration. (d) A person sitting in an inertial reference frame can accurately observe Newton's laws in action. /4K

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter6: Energy Of A System
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1. Indicate whether the sentence or statement is true or false. If false, modify it into true.
(a) The normal force FN that acts on an object is never equal in magnitude and opposite in direction to
the gravitational force that is acting on it.
/4K
2. An archer is standing on the edge of a cliff that is 40m high and is trying to hit a target located
150m [E] of him. He knows that the farthest range of his arrows occurs at an angle of elevation
of 37°, so he aims at that angle. What initial velocity does the arrow require to hit the target?
/4 K
3.
(b) An object experiencing a net force of zero is either not moving or moving at a constant velocity.
(c) A projectile has both a horizontal and vertical component to its acceleration.
(d) A person sitting in an inertial reference frame can accurately observe Newton's laws in action.
/6 A
/2 K
Two masses of 4.0 kg and 6.0 kg are connected by a "massless" rope over a "frictionless"
pulley as pictured in the diagram. The ramp is inclined at 30.0° and the coefficient of kinetic
friction on the ramp is 0.18. Calculate the
30⁰
a) acceleration of the system
b) tension between the each of the masses.
1|Page
4.0 kg
HK = 0.18
4. A rifle barrel is 0.85m long. The velocity of bullets coming out of the barrel is 256m/s. What
must be the acceleration of the bullet?
6.0 kg
Transcribed Image Text:1. Indicate whether the sentence or statement is true or false. If false, modify it into true. (a) The normal force FN that acts on an object is never equal in magnitude and opposite in direction to the gravitational force that is acting on it. /4K 2. An archer is standing on the edge of a cliff that is 40m high and is trying to hit a target located 150m [E] of him. He knows that the farthest range of his arrows occurs at an angle of elevation of 37°, so he aims at that angle. What initial velocity does the arrow require to hit the target? /4 K 3. (b) An object experiencing a net force of zero is either not moving or moving at a constant velocity. (c) A projectile has both a horizontal and vertical component to its acceleration. (d) A person sitting in an inertial reference frame can accurately observe Newton's laws in action. /6 A /2 K Two masses of 4.0 kg and 6.0 kg are connected by a "massless" rope over a "frictionless" pulley as pictured in the diagram. The ramp is inclined at 30.0° and the coefficient of kinetic friction on the ramp is 0.18. Calculate the 30⁰ a) acceleration of the system b) tension between the each of the masses. 1|Page 4.0 kg HK = 0.18 4. A rifle barrel is 0.85m long. The velocity of bullets coming out of the barrel is 256m/s. What must be the acceleration of the bullet? 6.0 kg
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