What is the final velocity of the two vehicle mass?
A 1500 kg car traveling at 15 m/s to the south collides with a 4500 kg truck that is intially at rest at a spotlight. The car and the truck stick together and move together after the collison. Therefore, the final velocity of the two-vehicle mass is 3.75 m/s south.
What is the mass of a baseball thrown at 25 m/s resulting in a momentum of 10 kg/m s?
0.4 kg
What is the velocity of a 900 kg car initially moving at 30m S?
The answer is 27.4 m/s.
What is the velocity of a 900 kg car initially moving at 30.0 m/s just after it hits a 150 kg deer initially running at 12.0 m/s in the same direction assume the deer remains in the car inelastic collision?
Therefore, the velocity of the car after hitting the deer is 28.29m/s.
What is the velocity in m/s of a 900 kg car initially moving at 30.0 m/s just after it hits a 150 kg deer initially running at 12.0 m/s in the same direction assume the deer remains on the car after crash?
So that’s 900 kilograms times 30.0 meters per second plus 150 kilograms times 12.0 meters per second divided by the total mass giving us a speed of 27.4 meters per second and that’s a velocity actually—it’s positive and it’s to the right—and there we go!
What is the momentum of a 120 pound cyclist that is traveling at 25 mph?
If you want the unit of momentum in metric system, just convert 120 lb to kg and 25 mph to m/s. Then substitute the converted units to the formula of momentum and the answer for momentum in metric unit is 609.47 kg.
Why is it important to follow through when trying to hit a home run?
Why is it important to “follow through” when trying to hit a homerun? maximizes time that the bat is in contact with the ball. increase amount of time it takes the person and therefore decreases force.
Why is increasing the time interval a safer way to land from a fall?
The safety net reduces the stopping force on a fallen acrobat by substantially increasing the time interval of the contact. The greater the impulse exerted on something, the greater will be the change in momentum. If the change in momentum occurs over a short time, the force of impact is large.
When you jump you usually bend your knees is this to increase the impact force?
When we bent our knees on landing, the time of impact increases and reduces the average force exerted during the entire process. This prevents the chance of damage to our body. Impulse momentum principle states that the impulse of a force is equal to the change in momentum produced.
How can impact force be reduced?
Minimizing Impact Force
- If you jump to the ground from any height, you bend your knees upon impact, extending the time of collision and lessening the impact force.
- A boxer moves away from a punch, extending the time of impact and lessening the force.
Why do gymnasts use thick floor mats?
Why do gymnasts use floor mats that are very thick? Because the cushion in the mat extends the time and lessens the force. the steel cord will stretch only a little, resulting in a short time of stop and a corresponding large force.
What is the most important thing in gymnastics?
The handstand is arguably the single most important skill and position in the sport of gymnastics. It’s the building block for essential skills on each of the four events. Being able to do a perfect handstand is one skill you should learn to master.
Why does a baseball catcher’s mitt have more padding than a conventional glove quizlet?
Why does a baseball catcher’s mitt have more padding than a conventional glove? The additional padding in a catcher’s mitt is too increase the time of impact. When a ball is caught, the padding in the mitt is compressed, increasing the time of impact and reducing the force of impact from the baseball.
Why are nylon ropes which stretch considerably under stress favored by mountain climbers?
Nylon ropes, which stretch considerably under tension, are favored by mountain climbers because they stretch and take time in coming to a stop when mountain climbers accidentally fall.
When jumping from a significant height Why is it advantageous?
When jumping from a significant height, it is advantageous to land with knees bent because it increases the time taken by person to come to stop, decreases the impact, and hurts less.
When you jump from an elevated position?
When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing.
Which would be more damaging driving into a very massive concrete wall with no give or having a head on collision at the same speed with an identical car moving toward you with the same speed?
Which would be more damaging, driving into a very massive concrete wall with no “give” or having a head-on collision @ the same speed w/ an identical car moving toward you with the same speed? Both the SAME.
Why should you bend at the knees when you jump from a height?
Answer. This is a consequence of the impulse momentum principle. When we bent our knees on landing, the time of impact increases and reduces the average force exerted during the entire process. This prevents the chance of damage to our body.
When the force of impact on an object is extended?
Physics the fourth
| A | B |
|---|---|
| When the force of impact on an object is extended in time, does the impulse increase or decrease? | Increases |
| Distinguish between impulses and momentum.Which is force x time and which is inertia in motion? | Impulse=force x time;momentum is inertia in motion. |
How can free runners extend the time of impact when they land on the ground after jumping a long distance?
In order to lessen the impact upon landing after a fall, or to decrease the force upon a set of fingers while grabbing onto a wall, it is essential to reduce the acceleration during each collision as much as possible. This requires increasing the time of impact by smoothly bending, flexing, or rolling during impact.
How does Newton’s 2nd law apply to running?
Newton’s second law also helps to explain what happens every time an athlete lands during running. When the foot hits the track, it will decelerate to a stop before leaving the track again. The faster the deceleration, the greater the force of impact on the foot.
What happens when you double the net force acting on an object?
It means that if force is constant, as mass is increased, acceleration decreases. resistance to changes in motion (also known as INERTIA.) If the net force on an object is doubled, its acceleration will double If the mass of an object is doubled, the acceleration will be halved . 20.
What is Newton’s 3rd law examples?
Examples of Newton’s third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton’s third law when designing rockets and other projectile devices.