A fast-moving VW Beetle traveling at 54 mph hit amosquitohovering at rest above the road. Which bug experienced the largest force?

A fast-moving VW Beetle traveling at 54 mph hit amosquitohovering at rest above the road. Which bug experienced the largest force?

1.       the insect

2.       They experienced the same magnitude of force.

3.       the VW

4.       Unable to determine

002 (part 2 of 2) 10.0 points Which bug experienced the greatest acceleration?

1.  Unable to determine.

2.  Their acceleration is same.

3.  the VW

4.  the insect

003       10.0 points A soccer ball kicked with a force of 13.8 N accelerates at 7.5 m/s2 to the right.

What is the mass of the ball? Answer in units of kg.

3. identical to the weight (gravitational force) of the person.

005       10.0 points An empty 240 kg elevator accelerates upward at 1.8 m/s2.

The acceleration of gravity is 9.8 m/s2 .

What is the tension in the cable that lifts the elevator cab?

Answer in units of N.

006       10.0 points A box weighing 670 N is pushed along a horizontal floor at constant velocity with a force of 230 N parallel to the floor.

What is the coefficient of kinetic friction between the box and the floor?

                        007      10.0 points

A(n) 834 N crate is being pushed across a level floor by a force of 377 N at an angle of 20◦ above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.22.

The acceleration of gravity is 9.81 m/s2 .

What is the acceleration of the box? Answer in units of m/s2.

                        008      10.0 points

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 96.[1] N at an angle of 62◦, as shown in the figure.

The acceleration of gravity is 9.8 m/s[2].

The box of books has a mass of 18 kg and the coefficient of kinetic friction between the bottom of the box and the floor is 0.22.

       elmasri (mwe339) - assignment#06-Newtons Laws and Forces - kendall - (SK1718)         2

What is the acceleration of the box? Answer in units of m/s2.

009 (part 1 of 2) 10.0 points

When a 153 N bag of nails hangs motionless from a single vertical strand of rope, how much tension is exerted in the strand? Answer in units of N.

010 (part 2 of 2) 10.0 points

How much tension if the bag is supported by 3vertical strands? That is, how much tension is exerted in each strand? Answer in units of N.

011       10.0 points Consider the 82 N light fixture supported as in the figure.

Find the tension in the supporting wires. Answer in units of N.

012 (part 1 of 2) 10.0 points

A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are µs = 0.7 and µk = 0.59, respectively.

The acceleration of gravity is 9.8 m/s2 .

What is the frictional force acting on the 41 kg mass?

Answer in units of N.

013 (part 2 of 2) 10.0 points

What is the largest angle which the incline can have so that the mass does not slide down the incline?

Answer in units of ◦.

014       10.0 points EXTRA credit:

A(n) 71 kg block is pushed along the ceiling with a constant applied force of 1000 N that acts at an angle of 64◦ with the horizontal, as in the figure. The block accelerates to the right at 5.3 m/s2.

The acceleration of gravity is 9.8 m/s2 .

What is the magnitude of the normal force the ceiling exerts on the block?

Answer in units of N.

[1] . larger than the weight (gravitational force) of the person.

[2] . smaller than the weight (gravitational force) of the person.