68 Answered Questions for the topic Momentum

Momentum

10/23/17

What is the speed
A 20-gram rubber bullet traveling at 150 m/s hits a stationary 8.5 kg concrete block. If the bullet bounces off of the block in the opposite direction at 100 m/s, what is the final speed of the... more
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Momentum Physics

10/19/17

momentum and speed
what is the momentum of a 70kg athlete jogging in a straight line on level ground at a speed of 6.0 m/s
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Momentum

10/18/17

How much force would it take for the batter to hit the ball outward at 160 mph to hit a home run
a baseball  pitcher throw a 145 gram fastball at 90 mph if an average batter is able to make contact with the ball for 0.7 milliseconds
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Momentum

10/18/17

How much force would it take for the batter to hit the ball outward at 160 mph to hit a home run
a basketball pitcher throw a 145 gram fastball at 90 mph if an average batter is able to make contact with the ball for 0.7 milliseconds 
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Momentum

10/14/17

How much force
if the cat glove moves back 10 cm while catching the ball how much force did the catcher have to use to stop the ball
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Momentum

10/14/17

How much force would it take
If an average batter is able to make contact with the ball for 0.7 milliseconds how much force would it take for the batter to hit the ball outward at 106 mph to hit a home run
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Momentum

10/14/17

how much force would be exerted
If he was not wearing his seatbelt the windshield would stop bobs head in about 0.001 seconds. How much force would be exerted on bobs head
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Momentum Physics Forces

07/24/17

Dynamics and Forces - Conservation of Momentum
After a 1.30 x 10^2kg astronaut (incl. equipment) connects a safety line (length = 22.0m) to herself and to the spacecraft (mass = 2.80 x 10^3kg), she pushes against the craft and moves away at a... more
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Momentum

07/11/17

identify mass, velocity, and unknown
The mass of ball A is 10 kilograms and the mass of ball B is 5 kilograms. Ifthe initial velocity is set to 3 meters per second for each ball, what is thefinal velocity of ball B if the final... more
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02/14/17

Calculating momentum, velocity, impulse and force.
A car (m=900kg) travelling at 70km/h hits a pedestrian (m=60kg) who is travelling at 1m/s in the same direction. After the collision the car has a velocity of 30km/h in the same direction it was... more
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02/14/17

Law of Conservation
A rocket is standing by to launch. While sitting on the launching pad the rocket has zero velocity and thus zero initial momentum (p1=0). When the rocket takes off, a bystander proclaims that the... more
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Momentum

02/09/17

throw a bottle and let go what happens to my body momentum question
I weigh 200lbs im holding a bottle that weighs 5lbs. I go to through the bottle at a velocity of 5mph at someone and at the last possible moment i change my mind and simply drop the bottle. How far... more
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Momentum Physics Collision

01/01/17

A physics question that uses momentum and collision concepts
A 3kg steel ball attached to a string is given an initial velocity of 1.8m/s and swings through an angle of 60 degrees, colliding with a 4kg steel cube also suspended by a string, initially at... more
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Momentum Physics Physics C

01/01/17

Momentum in physics on an explosion
a plastic sphere containing an explosive charge, rolling at 4 m/s undergoes a two dimensional explosion into 3 fragments of equal mass. when viewed from above, one fragment moves at 6 m/s at an... more
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Momentum Physics Collision

12/05/16

Physics momentum
A neutron of mass u traveling with a speed 5.00x105 m/s collides with a stationary alpha particle of mass 4u.  The neutron scatters off the alpha particle at an angle 65˚ with speed... more
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Momentum Physics

10/07/16

Physics Impulse
A car has a momentum px(t) = 3000 N*s - (200 N*s^2)/(t+1.00s).  Find the net force acting on thecar at t = 4.00 s
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05/18/16

Force of gravity? Acceleration?
Mars has a mass of 6.4 × 1023 kg. It has a moon named Phobos with a mass of 1.07 × 1016 kg. a. If their centers are 9400 km apart, what is the force of gravity acting on Phobos?b. If the radius of... more
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05/18/16

Period and speed of pendulum?
The period of motion for a pendulum is the amount of time it takes to swing from right to left and back to right again. The period is given by the equation , where T is the period and L is the... more
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05/18/16

Speed of launcher?
Dwight uses a spring (k = 40 N/m) on a horizontal surface to make a launcher for model cars. The spring is attached to a holder that has a mass of 0.5 kg. If he compresses the spring and releases... more
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05/18/16

Spring Constant? Velocity?
Lincoln goes bungee jumping. He has a mass of 102 kg.a. After his jump, Lincoln hangs from the cord motionless, with the cord stretched by 15 m. What is the spring constant of the bungee cord?b. At... more
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05/18/16

Velocity of the canoe?
Blake stands in a canoe in the middle of a lake. The canoe is stationary. Blake holds an anchor with mass 15 kg, then throws it west with a speed of 8 m/s. Blake has a mass of 115 kg and the canoe... more
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05/09/16

What kind of collision is this? What formulas do I use for a and b?
Bill forgets to put his car in park, and it starts rolling forward. When it is moving at a speed of 2 m/s, it collides with Tanya's car, which is moving 3 m/s backward. Bill's car bounces backward... more
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05/09/16

What force is applied to the car?
At a race track, a car of mass 1150 kg crashes into a concrete wall at a speed of 85 m/s.   a. The car crashes into the wall, stopping in 0.1 seconds. What force is applied to the car?   (I'm... more
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Momentum

03/12/16

Find the moment of inertia of the system
the position vectors of two point like object of mass 100kg and 200kg are (2,4,6)m and (3,5,7)m respectively.Find the moment of inertia of the system about Y- axis
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Momentum Physics Ap Physics

01/16/16

A 500 kg car is moving at 40 m/s. What is the impulse needed to stop this car?
I found the momentum (20,000 ns)   the other things the question asks is: if this car takes 15 sec to stop, what is the average braking force? what is the time rate of change in momentum?
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