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Which is having a higher value of momentum - a bullet of mass 10G moving with a velocity of 400m's or a cricket ball of mass 400G thrown with the speed of 90km?
Wiki User
∙ 12y ago
I am assuming that you meant the speed of the cricket ball to be 90km/h.
Momentum = mass in kg x velocity in m/s
The Bullet
Convert the mass from grams to kilograms.
10g x (1kg/1000g) = 0.01kg
Momentum of the bullet is 0.01kg x 400m/s = 4kg•m/s
The Cricket Ball
Convert km/h to m/s.
90km/h x (1000m/1km) x (1h/3600s) = 25m/s
Convert g to kg.
400g x (1kg/1000g) = 0.400kg
Momentum of the cricket ball = 0.400kg x 25m/s = 10kg•m/s
Answer: The cricket ball has the greater momentum.
Wiki User
∙ 12y ago
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Which should be the best on knocking the bear down- a rubber bullet or a lead bullet with the same momentum explain?
If we consider the bullets of same size,then rubber bullet having less density will have higher velocity and higher kinetic energy than that of lead bullet.Thus rubber bullet can impart more energy.Hence this would be more effective.
Calculate momentum of a particle having mass 28kg and velocity 7.8ms?
218.4
Why do you need momentum?
Momentum is defined as the "Mass in Motion". It is a Vector quantity. It depends on two variables (Object Mass and Velocity) . Its direction is same as objects velocity direction. In physics momentum is required to specify the motion of the object . If two bodies of same masses having different velocities have different momentum , in a similar way bodies of different masses having same velocity have different momentum. So , in order to describe the motion of object clearly one of the tool in classical mechanics is momentum
Can a body have kinetic energy without having momentum?
Momentum = (mass) x (speed) Kinetic Energy = 1/2 (mass) x (speed)2 It looks like the only way a body can have zero momentum is to have either zero mass or else zero speed, and if either of those is zero, then that makes the KE also zero as well, too. So the answer to the question is apparently: no.
A bullet fired horizontally over level ground hits the ground in 0.5 seconds If it had been fired with twice the speed in the same direction it would have hit the ground when?
Assuming no affects from air and a smooth geography, both bullets would fall at the same rate of 9.81 m/s^2 toward earth, and hit the ground simultaneously. You have to look at the bullet's velocity as having a horizontal and vertical velocity vectors. The vertical velocity vector is independent from that of the horizontal. The horizontal vector would be the speed at which the bullet is fired, and the vertical vector is the speed at which the bullet falls due to gravity.
Which should be the best on knocking the bear down- a rubber bullet or a lead bullet with the same momentum explain?
If we consider the bullets of same size,then rubber bullet having less density will have higher velocity and higher kinetic energy than that of lead bullet.Thus rubber bullet can impart more energy.Hence this would be more effective.
Calculate momentum of a particle having mass 28kg and velocity 7.8ms?
218.4
Why do you need momentum?
Momentum is defined as the "Mass in Motion". It is a Vector quantity. It depends on two variables (Object Mass and Velocity) . Its direction is same as objects velocity direction. In physics momentum is required to specify the motion of the object . If two bodies of same masses having different velocities have different momentum , in a similar way bodies of different masses having same velocity have different momentum. So , in order to describe the motion of object clearly one of the tool in classical mechanics is momentum
Can somthing have momentum without having energy?
momentum = mass * velocity kinetic energy = 1/2 mass * velocity^2 If an object has non-zero momentum, it has non-zero velocity. It thus has kinetic energy, at least. It most likely has other forms of energy as well (potential, thermal, etc.)
When does a car have momentum?
Momentum = Mass x Velocity. (p=m*v)The mass of an object made of matter can not be zero.If the object (car) is moving, then the velocity will be non-zero, and the object will have non-zero momentum.So, if you are driving or rolling the car, it has momentum.If it is parked, then it will have 0 velocity (with respect to the earth), and thus will have 0 momentum.So, when the car is moving, it has net momentum. When it is parked it has zero momentum. I then just becomes a mater of semantics whether having zero momentum is equivalent to not having momentum, or if it is actually a valid value for momentum or state of momentum.
Calculate momentum of a particle having mass 5 kg and velocity 5 ms?
25 kg m/s
Tennis ball have momentum?
Momentum is calculated by taking the product of mass times velocity. Thus, a moving tennis ball would have a nonzero momentum. However, since a tennis ball has a relatively small mass, it would need to have a high velocity in order to have a large value for its momentum. Since velocity is a vector (having both a magnitude and a direction), momentum is also a vector. When a tennis player hits a tennis ball with his racket, he imparts a force onto the tennis ball, which changes the direction of its momentum to return it over the net. (The value for this change in momentum is called impulse, which is equal to the product of the force applied and the time for which it is applied.)
Can abody have energy without having momentum?
yes. a body can have energy without momentum also. consider a body at a height 'h' m above the ground level , potential energy contained is = mgh but , as the velocity is 0 we can consider that the momentum of the body is 0
Can a body have kinetic energy without having momentum?
Momentum = (mass) x (speed) Kinetic Energy = 1/2 (mass) x (speed)2 It looks like the only way a body can have zero momentum is to have either zero mass or else zero speed, and if either of those is zero, then that makes the KE also zero as well, too. So the answer to the question is apparently: no.
Why does a cruise ship docking slowly and a speed boat going at maximum speed both have a large momentum?
the momentum of a body is reached using the equation MOMENTUM=MASS*VELOCITY , in this case, the cruise has a very large mass but a very low speed while the speedboat has a very high speed while having a comparitively low mass.
A bullet fired horizontally over level ground hits the ground in 0.5 seconds If it had been fired with twice the speed in the same direction it would have hit the ground when?
Assuming no affects from air and a smooth geography, both bullets would fall at the same rate of 9.81 m/s^2 toward earth, and hit the ground simultaneously. You have to look at the bullet's velocity as having a horizontal and vertical velocity vectors. The vertical velocity vector is independent from that of the horizontal. The horizontal vector would be the speed at which the bullet is fired, and the vertical vector is the speed at which the bullet falls due to gravity.
Can potential energy ever be less than kinetic energy?
The answer to both of your questions lies in the different nature of both quantities, momentum and kinetic energy. Momentum is a vector, kinetic energy is a scalar. This means that momentum has a magnitude and a direction, while kinetic energy just has a magnitude. Consider the following system: 2 balls with equal mass are rolling with the same speed to each other. Magnitude of their velocities is the same, but the directions of their velocities are opposed. What can we say about the total momentum of this system of two balls? The total momentum is the sum of the momentum of each ball. Since masses are equal, magnitudes of velocities are equal, but direction of motion is opposed, the total momentum of the system of two balls equals zero. Conclusion: the system has zero momentum. What can we say about the total kinetic energy of this system? Since the kinetic energy does not take into account the direction of the motion, and since both balls are moving, the kinetic energy of the system will be different from zero and equals to the scalar sum of the kinetic energies of both balls. Conclusion: we have a system with zero momentum, but non-zero kinetic energy. Assume now that we lower the magnitude of the velocity of one of the balls, but keep the direction of motion. The result is that we lower the total kinetic energy of the system, since one of the balls has less kinetic energy than before. When we look to the total momentum of the new system, we observe that the system has gained netto momentum. The momentum of the first ball does not longer neutralize the momentum of the second ball, since the magnitudes of both velocities are not longer equal. Conclusion: the second system has less kinetic energy than the first, but has more momentum. If we go back from system 2 to system 1 we have an example of having more kinetic energy, but less momentum. I hope this answers your question Kjell
