The next two questions refer to the following physical situation: Two blocks (masses m1 = 30...

The next two questions refer to the following physical situation:

Two blocks (masses m₁ = 30 kg and m₂ = 7 kg) sit atop one another as shown below. The coefficient of static friction between the blocks is μ_s= 0.32. There is no friction between the lower block and the surface on which it rests. A constant external force F is applied to the lower block.

What is F_max, the maximum magnitude of this force such that the upper block does not slide with respect to the lower block?

	a.	F_max = 158 N
	b.	F_max = 116 N
	c.	F_max = 61 N
	d.	F_max = 80 N
	e.	F_max = 141 N

If there is kinetic friction between the lower block and the surface, the magnitude of the maximum possible force F_max that can be exerted on the lower block before the upper block starts sliding with respect to the lower block...

	a.	stays the same.
	b.	decreases.
	c.	increases.

A precocious child wants to determine the moment of inertia, I_o, of the local merry-go-round. The child measures the radius of the merry-go-round (R = 2 m), then weighs herself (m = 25 kg), then notices that when she moves from the center of the merry-go-round to the rim, the rotational velocity of the merry-go-round changes from 0.3 rev/sec to 0.2 rev/sec. If the child treats herself as a point mass, what moment of inertia does she estimate for the merry-go-round?

	a.	I_o = 500 kg-m²
	b.	I_o = 300 kg-m²
	c.	I_o = 200 kg-m²
	d.	I_o = 400 kg-m²
	e.	I_o = 100 kg-m²

As the child moves from the center of the merry-go-round to the rim, the kinetic energy of the child plus the merry-go-round...

	a.	decreases.
	b.	stays the same.
	c.	increases

Solutions

Expert Solution

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

The next two questions refer to the following situation. In order to compare two kinds of...

The next two questions refer to the following situation. In order to compare two kinds of feed, thirteen pigs are split into two groups, and each group received one feed. The following are the gains in weight (kilograms) after a fixed period of time: Feed A: 8.0 7.4 5.8 6.2 8.8 9.5 Feed B: 12.0 18.2 8.0 9.6 8.2 9.9 10.3 We wish to test the hypothesis that Feed B gives rise to larger weight gains. 20. The appropriate test...

1. Suppose we have two blocks of masses m1 and m2. The block with mass m1...

1. Suppose we have two blocks of masses m1 and m2. The block with mass m1 is moving towards block m2 at speed v. After the collision, we measure the total kinetic energy and find that the total kinetic energy after the collision is m2/(m1+m2) less than the kinetic energy before the collision. Find the final speeds of the two blocks. What type of collision is this? 2. Explain, in words, how we know that a freely spinning asteroid in...

Problem: Two blocks for masses m1 and m2 are stacked on top of each other and...

Problem: Two blocks for masses m1 and m2 are stacked on top of each other and placed on a frictionless, horizontal surface. The surfaces between two blocks is rough and has a coeff of static friction, us. A horiz push of magnitude, F, directed to the right is applied on the bottom block. A. Derive an expression for the maximum horizontal force, F, that can be applied on the bottom block, m1, before the top block m2, begins to slip....

Two blocks of masses m1= 2.00 kgand m2= 4.10 kg are released from rest at a...

Two blocks of masses m1= 2.00 kgand m2= 4.10 kg are released from rest at a height of h= 4.40 m on a frictionless track. When they meet on the level portion of the track, they undergo a head-on, elastic collision. Determine the maximum heights to which m1 and m2 rise on the curved portion of the track after the collision.

An Atwood's machine consists of blocks of masses m1 = 9.1 kg and m2 = 20.0...

An Atwood's machine consists of blocks of masses m1 = 9.1 kg and m2 = 20.0 kg attached by a cord running over a pulley as in the figure below. The pulley is a solid cylinder with mass M = 8.00 kg and radius r = 0.200 m. The block of mass m2 is allowed to drop, and the cord turns the pulley without slipping. a) Why must tension T2 be greater than T1 B) what is the acceleration of...

You have two blocks, with respective masses of 8 kg and 12 kg sitting next to...

You have two blocks, with respective masses of 8 kg and 12 kg sitting next to each other on a table. You decide to move them both together, and push on the 8 kg block with a net force of 120 N such that it pushes the 12 kg block along with it. a. Find the acceleration for both blocks. b. Will both blocks feel the same net force? Explain. c. Draw a force diagram on the 8 kg block,...

Figure Q1 shows a double-inclined plane supporting two blocks M1 and M2 which have masses 12...

Figure Q1 shows a double-inclined plane supporting two blocks M1 and M2 which have masses 12 kg and 70 kg respectively. The system is released from rest in the position shown and the kinetic coefficient of friction between block M2 and the rough plane is ?? = 0.4. i) Compute the tension and acceleration of the blocks. ii) Using impulse-momentum method, determine the time taken when M2 reaches a speed of 2 m/s.

The next two questions (7 and 8) refer to the following: The weight of bags of...

The next two questions (7 and 8) refer to the following: The weight of bags of organic fertilizer is normally distributed with a mean of 60 pounds and a standard deviation of 2.5 pounds. 7. What is the probability that a random sample of 33 bags of organic fertilizer has a total weight between 1963.5 and 1996.5 pounds? 8. If we take a random sample of 9 bags of organic fertilizer, there is a 75% chance that their mean weight...

The next four questions refer to the following information: Two methods, A and B, are available...

The next four questions refer to the following information: Two methods, A and B, are available for teaching a certain industrial skill. There is a 95% chance of successfully learning the skill if method A is used, and an 80% chance of success if method B is used. However, method A is substantially more expensive and is therefore used only 25% of the time (method B is used the other 75% of the time). The following notations are suggested: A—method...

two masses m1 = 4.70 kg and m2 which has a mass 50.0% that of m1,...

two masses m1 = 4.70 kg and m2 which has a mass 50.0% that of m1, are attached to a cord of negligible mass which passes over a frictionless pulley also of negligible mass. If m1 and m2 start from rest, after they have each traveled a distance h = 2.90 m, use energy content to determine the following. (a) speed v of the masses (b) magnitude of the tension T in the cord

Subjects