A student drops two ball bearings, a lighter one and a heavier one, from a top...
A student drops two ball bearings, a lighter one and a heavier one, from a top of a roof. The friction is insignificant. Just before hitting the ground, the heavier ball has twice the kinetic energy. How much faster did it go?
so to do this I just did. KE = 1/2 m V^2
2KE = mv^2
so 0.5 faster?
Homework Answers
Add Answer to:
A student drops two ball bearings, a lighter one and a heavier
one, from a top...
The professor didn't make an answer key for this study guide and I wanted to know if I'm doing th...
The professor didn't make an answer key for this study guide and I wanted to know if I'm doing these right. 4. A man pushes with a force of 700 N on a broken down car at an angle of 0 degrees from horizontal. He manages to move it form to a garage. How much energy does he use? 5. A block sits on a horizontal surface with friction. The mass of the block is kg. A force of 14Nis...
two satellites, one lighter and the other twice as massive, describe different orbits around the earth,...
two satellites, one lighter and the other twice as massive, describe different orbits around the earth, the lighter one going on an orbit of radius twice the radius of the heavier one, 2m, r, 2r. 1.) consider one single satellite, say the lighter one. write down the equation for the gravitational force exerted by the Earth on this satellite. 2.) write down Newton second law for this satellite to go in a circular orbit. 3.) determine the equation for the...
Problem 9 m,r A solid ball of mass m and radius r sits at rest at the top of a hill of height H l...
Problem 9 m,r A solid ball of mass m and radius r sits at rest at the top of a hill of height H leading to a circular loop-the loop. The center of mass of the ball will move in a circle of radius R if it goes around the loop. The moment of inertia of a solid ball is Ibull--mr. (a) Find an expression for the minimum height H for which the ball barely goes around the loop, staying...
Hi I need help with the following problems: 1.A ball is thrown horizontally from the roof...
Hi I need help with the following problems: 1.A ball is thrown horizontally from the roof of a building 45.0 m tall and lands 24.0 m from the base. What was the ball’s initial speed? 2.A football is kicked at ground level with a speed of at an angle of 36.9º to the horizontal. How much later does it hit the ground? How height does it rise? What is its range? 3.A projectile is fired with an initial speed of...
please answer all 5 questions , please ... thanks A rock is thrown horizontally from the...
please answer all 5 questions , please ... thanks
A rock is thrown horizontally from the top of a 10 m cliff with an initial horizontal velocity of 10 m/s. It has a Kinetic energy of 78 J when it in at a height of 3.0 m above the ground. If 20% of its initial mechanical energy is used in against the air friction, the mass of the rock is: 0.5 kg 1.0 kg 1.5 kg 2.0 kg None of...
Procedure: Materials: 1. apparatus 2. 2 pieces of metal track 3. plastic or metal ball 4....
Procedure: Materials: 1. apparatus 2. 2 pieces of metal track 3. plastic or metal ball 4. timer 5. meter stick 6. micrometer 7. 2 photogates Assemble your ramp as shown in Figure (1) in the next page. Then set up photogates in location 2 and 3. Measure the diameter (in m) of the metal balls (you will need it for speed calculations). Then, measure the weight (mass) of the ball (in kg). To have a better measurement of the time,...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
I need the answers with steps please! 10. A boy throws a ball with an initial...
I need the answers with steps please!
10. A boy throws a ball with an initial velocity of 25 m/s at an angle of 30° above the horizontal. If air resistance is negligible, how high above the projection point is the ball after 2.0s? How long is it in the air, and how far does it go before hitting the ground? 11. A projectile leaves the ground at 150 m/s and reaches a maximum height of 0.57 km. If there...
Linear Momentum of an object is conserved At all times b. Only when the net external...
Linear Momentum of an object is conserved At all times b. Only when the net external force on the object is Zero When the net external torque on the object is Zero d. Never A truck of mass 4000 (kg) is moving at 10 (m/s). A car of mass 1000 (kg) is moving at 40 (m/s). So, the truck’s momentum, compared to the car, is Greater b. Smaller c. the same d. Cannot say without knowing their accelerations A 1000...
Really need help with 1) How fast was Stan going at the time of impact? Stan the Man, from the local circus, was a human cannon ball. While practicing one day, he was shot out of a cannon and into a...
Really need help with 1) How
fast was Stan going at the time of impact?
Stan the Man, from the local circus, was a human cannon ball. While practicing one day, he was shot out of a cannon and into a canyon and subsequently died. It is believed it was murder but suicide cannot be ruled out, yet. Here are the facts of the case One afternoon, Stan climbed into the cannon for reasons we do not know. According to...
Problem 9 m,r A solid ball of mass m and radius r sits at rest at the top of a hill of height H leading to a circular loop-the loop. The center of mass of the ball will move in a circle of radius R if it goes around the loop. The moment of inertia of a solid ball is Ibull--mr. (a) Find an expression for the minimum height H for which the ball barely goes around the loop, staying...
please answer all 5 questions , please ... thanks
A rock is thrown horizontally from the top of a 10 m cliff with an initial horizontal velocity of 10 m/s. It has a Kinetic energy of 78 J when it in at a height of 3.0 m above the ground. If 20% of its initial mechanical energy is used in against the air friction, the mass of the rock is: 0.5 kg 1.0 kg 1.5 kg 2.0 kg None of...
Procedure: Materials: 1. apparatus 2. 2 pieces of metal track 3. plastic or metal ball 4. timer 5. meter stick 6. micrometer 7. 2 photogates Assemble your ramp as shown in Figure (1) in the next page. Then set up photogates in location 2 and 3. Measure the diameter (in m) of the metal balls (you will need it for speed calculations). Then, measure the weight (mass) of the ball (in kg). To have a better measurement of the time,...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
I need the answers with steps please!
10. A boy throws a ball with an initial velocity of 25 m/s at an angle of 30° above the horizontal. If air resistance is negligible, how high above the projection point is the ball after 2.0s? How long is it in the air, and how far does it go before hitting the ground? 11. A projectile leaves the ground at 150 m/s and reaches a maximum height of 0.57 km. If there...
Really need help with 1) How
fast was Stan going at the time of impact?
Stan the Man, from the local circus, was a human cannon ball. While practicing one day, he was shot out of a cannon and into a canyon and subsequently died. It is believed it was murder but suicide cannot be ruled out, yet. Here are the facts of the case One afternoon, Stan climbed into the cannon for reasons we do not know. According to...
Most questions answered within 3 hours.
-
The cheetah is one of the fastest accelerating animals, for it
can go from rest to...
asked 55 minutes ago -
CaCO3 (s) ⇌ CaO (s) + CO2 (g)
At 637 °C, the reaction reaches equilibrium.
If...
asked 1 hour ago -
The condensate from a steam distillation contains 12.0 g of
compound A and 18.0 g of...
asked 4 hours ago -
A major economic benefit of fixed exchange rates compared to
floating rates is that
a. the...
asked 4 hours ago -
1) For this reaction,
SiCl4 (l)+ 2H2O(g) <->
SiO2 (s) + 4HCl (g) DeltaH = -127 KJ...
asked 4 hours ago -
Which of the following does NOT add to US GDP? A. Saudi Arabia
buys fighter jets...
asked 6 hours ago -
2. Describe market equilibrium in terms of the following
characteristics
d.
How supply and demand interactions...
asked 6 hours ago -
1a. Create a class named Computer
- Separate declaration from implementation (i.e. Header and CPP
files)...
asked 6 hours ago -
A medical researcher
believes that a drug changes the body's temperature. Seven test
subjects are randomly...
asked 6 hours ago -
A call option on Project Cash Flow Consulting Inc.'s stock (PCF)
has a market price of...
asked 6 hours ago -
A study on the latest fad diet claimed that the amounts of
weight lost by all...
asked 7 hours ago -
give examples of how gene expression is inherited to the next
generation?
asked 7 hours ago