Homework Answers
A woman is 1.8 m tall and has a mass of 75 kg. She moves past...
A woman is 1.8 m tall and has a mass of 75 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 1.8 × 1010 kg·m/s. What does the observer measure for her height?
The acceleration definition a (vf-vo/At Final velocity vf v0+a t Multiply by mass m*vf mvo+ m'aAt...
The acceleration definition a (vf-vo/At Final velocity vf v0+a t Multiply by mass m*vf mvo+ m'aAt so that m'vf m'v+F At Momentum mass velocity Impulse F At Velocity and KE values in a collision would depend on the observer reference frame KE 0.5*m v v pp/2m when momentum p -m'v A lab frame observer reported that a 3 kg impactor-A moving at 15 m/s collided with a stationary 10 kg target-B on a smooth table. 1a- Find the velocity magnitude...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 °C moves...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 °C moves to the right with a speed of 3.0 x 103 m/s. It enters a uniform electric field region where the field is known to be parallel to particle's direction of motion. If the particle is to be brought to rest in the space of 4.0 cm, (a) What potential difference does it have to go through to stop this way? (b) what is the...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 uC moves...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 uC moves to the right with a speed of 3.0 x 103 m/s. It enters a uniforn.lectric field region where the field is known to be parallel to particle's direction of motion. If the particle is to be brought to rest in the space of 4.0 cm, (a) What potential difference does it have to go through to stop this way? (b) what is the strength...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5 m on a merry-go-round (rmgr = 2.0 m, Imgr = 1000 kg*m2) with a constant force F = 90 N applied tangentially to the edge of the merry-go-round (i.e., the force is perpendicular to the radius). The merry-go-round resists spinning with a frictional force of f = 10 N acting at a radius of 1 m and a frictional torque τ = 15 N*m...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s along a horizontal road where a frictional force is 200N. Calculate the power developed by the engine. If the car now moves up an incline at the same constant speed, calculate the new power developed by the engine. Assume that the frictional force is still 200 N and that sin(theta)=1/20 where theta is the angle of the incline to the horizontal. Problem 2: An...
A mass of m kilograams (kg) is mounted on top of a vertical spring. The spring is L metres long when disengaged and the end not attached to the mass is fixced to the ground. The mass moves vertic...
A mass of m kilograams (kg) is mounted on top of a vertical spring. The spring is L metres long when disengaged and the end not attached to the mass is fixced to the ground. The mass moves vertically up and down, acted on by gravity, the restoring force T of the spring and the damping force R due to friction: see the diagram below The gravitational force is mg dowswards, where g- 9.8m is acceleration due to gravity, measured...
1. Three children are riding on the edge of a merry‑go‑round that has a mass of...
1. Three children are riding on the edge of a merry‑go‑round that has a mass of 105 kg and a radius of 1.80 m. The merry‑go‑round is spinning at 22.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the 28.0 kg child moves to the center of the merry‑go‑round, what is the new angular velocity in revolutions per minute? Ignore friction, and assume that the merry‑go‑round can be treated as a solid disk and the children...
4. What is the buoyant force acting on a plastic toy having a mass of 13 kg and a volume of 0.011 m when it is su...
4. What is the buoyant force acting on a plastic toy having a mass of 13 kg and a volume of 0.011 m when it is submerged in water having a density of 1000 kg/m? 5. Nelly is driving her 1400 kg car at 35 m/s on a level road when she encounters a patch of ice. The 2200 kg truck in front of her is driving in the same direction, but at 18 m/s. After the collision, the truck...
A 1.85 m tall basketball player attempts a goal 14.03m from the basketball hoop, which is...
A 1.85 m tall basketball player attempts a goal 14.03m from the basketball hoop, which is at the height of 3.05 m. The acceleration of gravity id 9.81 m/s^2. If he shoots the ball at an angle of 46.0 degree, at what initial speed must he throw the basketball so that it goes through the hoop without striking the board? What is the time required for the ball to reach its maximum height? Determine the maximum height reached by the...
The acceleration definition a (vf-vo/At Final velocity vf v0+a t Multiply by mass m*vf mvo+ m'aAt so that m'vf m'v+F At Momentum mass velocity Impulse F At Velocity and KE values in a collision would depend on the observer reference frame KE 0.5*m v v pp/2m when momentum p -m'v A lab frame observer reported that a 3 kg impactor-A moving at 15 m/s collided with a stationary 10 kg target-B on a smooth table. 1a- Find the velocity magnitude...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 °C moves to the right with a speed of 3.0 x 103 m/s. It enters a uniform electric field region where the field is known to be parallel to particle's direction of motion. If the particle is to be brought to rest in the space of 4.0 cm, (a) What potential difference does it have to go through to stop this way? (b) what is the...
A particle of a mass 1.2 x 10-11 kg and negative charge – 1.0 uC moves to the right with a speed of 3.0 x 103 m/s. It enters a uniforn.lectric field region where the field is known to be parallel to particle's direction of motion. If the particle is to be brought to rest in the space of 4.0 cm, (a) What potential difference does it have to go through to stop this way? (b) what is the strength...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s along a horizontal road where a frictional force is 200N. Calculate the power developed by the engine. If the car now moves up an incline at the same constant speed, calculate the new power developed by the engine. Assume that the frictional force is still 200 N and that sin(theta)=1/20 where theta is the angle of the incline to the horizontal. Problem 2: An...
A mass of m kilograams (kg) is mounted on top of a vertical spring. The spring is L metres long when disengaged and the end not attached to the mass is fixced to the ground. The mass moves vertically up and down, acted on by gravity, the restoring force T of the spring and the damping force R due to friction: see the diagram below The gravitational force is mg dowswards, where g- 9.8m is acceleration due to gravity, measured...
4. What is the buoyant force acting on a plastic toy having a mass of 13 kg and a volume of 0.011 m when it is submerged in water having a density of 1000 kg/m? 5. Nelly is driving her 1400 kg car at 35 m/s on a level road when she encounters a patch of ice. The 2200 kg truck in front of her is driving in the same direction, but at 18 m/s. After the collision, the truck...
A 1.85 m tall basketball player attempts a goal 14.03m from the basketball hoop, which is at the height of 3.05 m. The acceleration of gravity id 9.81 m/s^2. If he shoots the ball at an angle of 46.0 degree, at what initial speed must he throw the basketball so that it goes through the hoop without striking the board? What is the time required for the ball to reach its maximum height? Determine the maximum height reached by the...
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