Question

In: Physics

20, This picture is an example of ____________ Elastic Collision Inelastic collision 21, This picture is...

20, This picture is an example of ____________

Elastic Collision

Inelastic collision

21,

This picture is an example of ____________

Elastic Collision

Inelastic collision

22,

The law of conservation of momentum states that the total momentum of all objects interacting with each other will ________________________ no matter of the nature of the forces between the object.

increase

decrease

remain constant

fluctuate

23,

This is an example of what kind of collision?

Elastic

Inelastic

24,

What is Newton's Law of Conservation of Momentum?

Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force

Force = mass x acceleration

For every action there is an equal and opposite reaction

Momentum can not be created or destroyed without outside forces

25,

True/False: Elastic Collision causes a rebound.

True

False

26,

Which of the following does NOT affect momentum?

Mass

Speed

Direction

Color of Object

27,

A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?

25 m/s

375 m/s

25 kg m/s

375 kg m/s

28,

A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?

6030 kg

0.0134 kg

74.4 kg

80 kg

29,

The purpose of crumple zones on a car is to

decrease time of impact.

increase force of impact.

increase the time of impact.

decrease the impulse during impact.

30,

The difference between a car hitting a wall vs. a car hitting a hay stack is

the Impulse on the car hitting the wall is greater

the change in momentum of the car hitting the wall is greater

the force on the car hitting the hay stack is greater

the collision time of the car hitting the hay stack is greater

31,

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's momentum?

45 kg m/s

72 kg m/s

32.4 kg m/s

0.45 kg m/s

32,

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other. The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s. The carts stick together when they collide. Calculate their final speed.

0.5 m/s

1.0 m/s

0.33 m/s

0.67 m/s

33

If two objects have the same mass, then the faster moving object has ____________ momentum.

more

less

the same

34,

While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?

2 m/s

8 m/s

-2 m/s

1.5 m/s

35,

The total momentum before a collision is _________ the total momentum after a collision.

equal to

less than

more than

It depends on the type of collision

36,

A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy?

3.2 J

4.2 J

2.0 J

12.8 J

37,

A 2600 kilogram car is moving at a speed of 25 m/s. How much kinetic energy does the car have?

427,500 J

237,500 J

812,500 J

537,500 J

Expert Solution

genius_generous answered 2 years ago

The Ballistic Pendulum 1 Was the collision between the ball and the pendulum elastic or inelastic?...

The Ballistic Pendulum 1 Was the collision between the ball and the pendulum elastic or inelastic? Confirm your conclusion using data from the lab. (show all calculations!) 2 Was kinetic energy conserved during the collision? How do you know? (show calculations!) If kinetic energy was not conserved, where was the energy lost to? 3 Suppose the ball did not stick to the pendulum but rather bounced back toward the launcher. In other words, suppose the blockat the end of the...

Mathematically, what role does friction play in perfectly elastic and inelastic collision?

• Is demand for illegal drugs elastic, inelastic, highly elastic, highly inelastic,perfectly elastic, or perfectly inelastic?...

• Is demand for illegal drugs elastic, inelastic, highly elastic, highly inelastic,perfectly elastic, or perfectly inelastic? • What would the shape of that demand curve be (flatter or steeper)? • Prior to completing the Written assignment, you probably have ideas about how we can reduce illegal drug usage. Should we work more on reducing supply or reducing demand? • Why do you think that strategy (supply-side or demand-side) is best?

Question 4(3pts) State the definitions of elastic, inelastic, and completely inelastic collisions. Give an example of...

Question 4(3pts) State the definitions of elastic, inelastic, and completely inelastic collisions. Give an example of a situation where the final kinetic energy is greater than the initial value.

Elastic and inelastic supply

The following graph shows the supply of a good For each of the regions, use the midpoint method to identify whether the supply of this good is elastic or inelastic. Elastic Inelastic Region Between Y and Z Between W and X True or False: For high levels of quantity supplied where firms have reached near maximum capacity, supply becomes more elastic because firms may need to...

1. Explain the difference between an elastic and inelastic collision. 2. How many times more energy...

1. Explain the difference between an elastic and inelastic collision. 2. How many times more energy is required to increase the speed of a 2200 pound car by 10 mph if car initially is going 30 mph versus it initially going 80 mph? (convert to metric) 3. how many horse power are required to accelerate from 80 mph to 90 mph in 0.75 seconds? (tell me the average horsepower. 1 horsepower = 750 watts) 4. will a solid lead cylinder...

For each of the following, identify where demand is elastic, inelastic, perfectly elastic, perfectly inelastic, or unit elastic:

For each of the following, identify where demand is elastic, inelastic, perfectly elastic, perfectly inelastic, or unit elastic: (a) Price rises by 10 percent, and the quantity demanded falls by 2 percent (b) Price falls by 5 percent, and the quantity demanded rises by 4 percent. (c) Price falls by 6 percent, and the quantity demanded does not change. (d) Price rises by 2 percent and the quantity demanded falls by 1 percent.

2. Elastic, inelastic, and unit-elastic demand

2. Elastic, inelastic, and unit-elastic demand The following graph shows the demand for a good For each region on the graph given in the following table, use the midpoint method to identify whether the demand for this good is elastic, (approximately) unit elastic, or inelastic. True or False: The value of the price elasticity of demand is not equal to the slope of the demand curve.

Two equal mass object experience a totally inelastic elastic collision. Mass 1 has an initial velocity...

Two equal mass object experience a totally inelastic elastic collision. Mass 1 has an initial velocity of 10 m/s in the negative y-direction. Mass 2 has an initial velocity of 10 m/s in the positive x-direction. The collision occurs at the origin. What is the magnitude and direction of the velocity of the combined mass? What is the kinetic energy conserved in the collision? If not what fraction of kinetic energy was lost?

Define elastic and inelastic demand