Homework Answers
A steel ball of mass m = 1 kg and a cord of negligible mass and...
A steel ball of mass m = 1 kg and a cord of negligible mass and
length L = 2 m make up a simple pendulum that can pivot without
friction about the point O (see below). This pendulum is released
from rest in a horizontal position and when the ball is at its
lowest point it strikes a block of mass m = 1 kg sitting at rest on
a shelf. Assume that the collision is perfectly elastic and...
012 (part 1 of 4) 10.0 points A massless spring with force constant 277 N/m is...
012 (part 1 of 4) 10.0 points A massless spring with force
constant 277 N/m is fastened at its left end to a vertical wall, as
shown below. The acceleration of gravity is 9.8 m/s 2 . Initially,
the 8 kg block and 3 kg block rest on a horizontal surface with the
8 kg block in contact with the spring (but not compressing it) and
with the 3 kg block in contact with the 8 kg block. The 8...
018 (part 1 of 2) 10.0 points A jet aircraft is traveling at 290 m/s in...
018 (part 1 of 2) 10.0 points A jet aircraft is traveling at 290 m/s in hor- izontal flight. The engine takes in air at a rate of 39.3 kg/s and burns fuel at a rate of 1.37 kg/s. The exhaust gases are ejected at 441 m/s relative to the aircraft. Find the thrust of the jet engine. Answer in units of N. 019 (part 2 of 2) 10.0 points Find the delivered power. Answer in units of W.
013 (part 1 of 2) 10.0 points In an experiment designed to measure the strength of...
013 (part 1 of 2) 10.0 points In an experiment designed to measure the strength of a uniform magnetic field produced by a set of coils, electrons are accelerated from rest through a potential difference of 323 V. The resulting electron beam travels in a circle with a radius of 6.96 cm. The charge on an electron is 1.60218 x 10-19 C and its mass is 9.10939 x 10-31 Assuming the magnetic field is perpendic- ular to the beam, find...
013 (part 1 of 4) 10.0 points You throw a softball (of mass 200 g) straight...
013 (part 1 of 4) 10.0 points You throw a softball (of mass 200 g) straight up into the air. It reaches a maximum altitude of 13.9 m and then returns to you What is the gravitational potential energy of the soft ball at its highest position? Assume the ball departed from and returned to ground level. Answer in units of J. 014 (part 2 of 4) 10.0 points Assume no energy is lost by the softball while it is...
Can someone please help me with 18 and 19 at the bottom of the hill? Answer...
Can someone please help me with 18 and 19
at the bottom of the hill? Answer in units of m/s 017 10.0 points A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 2.1 m/s. The acceleration of gravity is 9.81 m/s2 What is the initial height of the bob? Answer in units of m. m. 018 (part 1 of 2) 10.0 points he rope A 1.74x...
014 10.0 points A phone cord is 2.4 m long. The cord has a mass of...
014 10.0 points A phone cord is 2.4 m long. The cord has a mass of 0.243 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.754 s. What is the tension in the cord? Answer in units of N.
#10 is 5778.44 N i just can’t figure out #11 010 (part 1 of 2) 10.0...
#10 is 5778.44 N i just can’t figure out #11
010 (part 1 of 2) 10.0 points A 15.6 kg block is dragged over a rough, hor izontal surface by a constant force of 87.7 N acting at an angle of 25.5° above the hori zontal. The block is displaced 73 m, and the 5. pulley 6. screw carney (00:4556)-#8 Machines and Energy-roden-(roden 18) coefficient of kinetic friction is 0.141 tically in order to get it into the back of...
013 (part 1 of 4) 10.0 points A 143 Ω lamp, a 27 Ω electric heater,...
013 (part 1 of 4) 10.0 points A 143 Ω lamp, a 27 Ω electric heater, and a 49 Ω fan are connected in parallel across a 124 V line. What total current is supplied to the cir- cuit? Answer in units of A 014 (part 2 of 4) 10.0 points What is the voltage across the fan? Answer in units of V 015 (part 3 of 4) 10.0 points What is the current in the lamp? Answer in units...
Problem 5: A cord with length L 2 m has a ball of mass m 1...
Problem 5: A cord with length L 2 m has a ball of mass m 1 kg attached to the end. The ball is released from rest, when the cord makes an angle of 30° with the vertical. 1) How much work does the gravitational force do on the ball from A to B? 2) What is the speed of the ball at point B? 3) What is the tension in the cord at point B? 4) What initial velocity...
A steel ball of mass m = 1 kg and a cord of negligible mass and
length L = 2 m make up a simple pendulum that can pivot without
friction about the point O (see below). This pendulum is released
from rest in a horizontal position and when the ball is at its
lowest point it strikes a block of mass m = 1 kg sitting at rest on
a shelf. Assume that the collision is perfectly elastic and...
012 (part 1 of 4) 10.0 points A massless spring with force
constant 277 N/m is fastened at its left end to a vertical wall, as
shown below. The acceleration of gravity is 9.8 m/s 2 . Initially,
the 8 kg block and 3 kg block rest on a horizontal surface with the
8 kg block in contact with the spring (but not compressing it) and
with the 3 kg block in contact with the 8 kg block. The 8...
018 (part 1 of 2) 10.0 points A jet aircraft is traveling at 290 m/s in hor- izontal flight. The engine takes in air at a rate of 39.3 kg/s and burns fuel at a rate of 1.37 kg/s. The exhaust gases are ejected at 441 m/s relative to the aircraft. Find the thrust of the jet engine. Answer in units of N. 019 (part 2 of 2) 10.0 points Find the delivered power. Answer in units of W.
013 (part 1 of 2) 10.0 points In an experiment designed to measure the strength of a uniform magnetic field produced by a set of coils, electrons are accelerated from rest through a potential difference of 323 V. The resulting electron beam travels in a circle with a radius of 6.96 cm. The charge on an electron is 1.60218 x 10-19 C and its mass is 9.10939 x 10-31 Assuming the magnetic field is perpendic- ular to the beam, find...
013 (part 1 of 4) 10.0 points You throw a softball (of mass 200 g) straight up into the air. It reaches a maximum altitude of 13.9 m and then returns to you What is the gravitational potential energy of the soft ball at its highest position? Assume the ball departed from and returned to ground level. Answer in units of J. 014 (part 2 of 4) 10.0 points Assume no energy is lost by the softball while it is...
Can someone please help me with 18 and 19
at the bottom of the hill? Answer in units of m/s 017 10.0 points A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 2.1 m/s. The acceleration of gravity is 9.81 m/s2 What is the initial height of the bob? Answer in units of m. m. 018 (part 1 of 2) 10.0 points he rope A 1.74x...
014 10.0 points A phone cord is 2.4 m long. The cord has a mass of 0.243 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.754 s. What is the tension in the cord? Answer in units of N.
#10 is 5778.44 N i just can’t figure out #11
010 (part 1 of 2) 10.0 points A 15.6 kg block is dragged over a rough, hor izontal surface by a constant force of 87.7 N acting at an angle of 25.5° above the hori zontal. The block is displaced 73 m, and the 5. pulley 6. screw carney (00:4556)-#8 Machines and Energy-roden-(roden 18) coefficient of kinetic friction is 0.141 tically in order to get it into the back of...
013 (part 1 of 4) 10.0 points A 143 Ω lamp, a 27 Ω electric heater, and a 49 Ω fan are connected in parallel across a 124 V line. What total current is supplied to the cir- cuit? Answer in units of A 014 (part 2 of 4) 10.0 points What is the voltage across the fan? Answer in units of V 015 (part 3 of 4) 10.0 points What is the current in the lamp? Answer in units...
Problem 5: A cord with length L 2 m has a ball of mass m 1 kg attached to the end. The ball is released from rest, when the cord makes an angle of 30° with the vertical. 1) How much work does the gravitational force do on the ball from A to B? 2) What is the speed of the ball at point B? 3) What is the tension in the cord at point B? 4) What initial velocity...
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