A physics TA pushes a 20.0 kg equipment cart at a constant velocity for a distance of 18.0 m down the hall. The force she exerts on the cart is directed at an angle 21.0° below the horizontal, and the force of friction opposing the motion of the cart is 50.0 N. Determine the following. a) the work done (in J) by the force the TA exerts on the cart b) the work done (in J) by the force of friction acting on the cart

Question

A physics TA pushes a 20.0 kg equipment cart at a constant velocity for a distance of 18.0 m down the hall. The force she exerts on the cart is directed at an angle 21.0° below the horizontal, and the force of friction opposing the motion of the cart is 50.0 N. Determine the following.

a) the work done (in J) by the force the TA exerts on the cart

b) the work done (in J) by the force of friction acting on the cart

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Physics

Newtons Laws of Motion

Related Physics Q&A

Find answers to questions asked by students like you.

Q: In the following diagram, the current passing throueh 20 Ohm is 1.5 A. 20-2 1.5A www 302 www 402 502...

A: Given: Resistance = 20 Ω Current = 1.5 A  

Q: Prove the “parallel axis theorem”: The moment of inertia I of a body about a given axis is I = Im +M...

A: Parallel axis theorem: Moment of inertia passing through an axis which is parallel to the axis passi...

Q: answer Q 3

A: Answer (3) When the mass is just start to slide than the centripetal force is equal to the force of ...

Q: A ball falls from height of 19.5 m, hits the floor, and rebounds vertically upward to height of 15.5...

A: Given data: Height, h1=19.5 m and h2=15.5 m Mass of ball, mball=0.375 kg Time interval, t=0.03 s

Q: A microwave oven produces electromagnetic radiation at λ=12.2cmand produces a power of 720 W. Calcul...

A: The given values are, λ=12.2 cm=12.2×10-2 mP=720 W

Q: A photon of 3.53 x 10-28 kg.m/s momentum is emittedfrom a hydrogen atom. To what spectrum series doe...

A: Given values: The momentum of photon, p=3.53×10-28 kg.m/s Velocity of light, c=3×108 m/s Planck's co...

Q: A spot of paint on a bicycle tire moves in a circular path of radius 0.41 m. When the spot has trave...

A: Given information: The radius of the circular path, r=0.41 m The linear distance traveled by the spo...

Q: Is In the following diagram, use Kirchhoff's rules to solve current passing through8 ohm resistor, I...

A: Considering the current in the left hand loop as I1 And that in the right hand loop be I3 from the d...

Q: Please show all work step-by step

A: Click to see the answer

Q: 10. 5 beats per second are produced in vibration two closed organ pipes simultaneously. If the ratio...

A: Click to see the answer

Q: A bicycle tire has a mass of 2.52 kg and a radius of 0.348 m. (a) Treating the tire as a hoop, what ...

A: Given data: Mass of the tire, m=2.52 kg Radius of the tire, r=0.348 m (a) Moment of inertia passing ...

Q: A 10.1-g bullet is fired into a stationary block of wood having mass m = 4.90 kg. The bullet imbeds ...

A: mass of bullet, m = 10.1 g  mass of block, M = 4.9 kg  velocity after collision, v = 0.597 m/s  

Q: Select the correct answer for each of the following items: 1. The clipping circuit is used for: (a) ...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Say we have a mass, m, situated at a height, h, above an ideal spring with force constant k.  The ma...

A: At the highest and lowest position of the spring, the velocity of the mass is zero, thus initial and...

Q: A proton is confined to a one dimensional infinite potential well 100 pmwide. What is its ground-sta...

A: Ground state energy one dimensional infinite potential well E1=h28mpL2=6.626×10-34 J·s281.672×10-27 ...

Q: We have considered a driven RLC circuit with components in series in class, but what about when they...

A: Reactance of an inductor is given as- XL=ωL=2πfL Reactance of a capacitor is given as- XC=1ωC=12πfC ...

Q: Why is it necessary to use a small diameter, thin-walled capillary for holding the sample in the mel...

A: Solution:  

Q: Three identical point charges (+2.0 nC) are placed at the corners of an equilateral triangle with 2....

A: The electric potential at either side of the triangle is, V=kq1r1+kq2r2+kq2r2=kqr/2+kqr/2+kq3/4r=kq1...

Q: A child is standing on top of a 15ft hill, getting ready to run down all the way to the bottom. If t...

A: Introduction: The energy of a body is stored in the form of potential energy due to the height raise...

Q: Calculate the rate of heat conduction out of the humanbody, assuming that the core internal temperat...

A: Rate of heat conduction is given by, P=Qt  =kAΔTd The change in temperature is is, ΔT=37°C-34°C     ...

Q: Calculate the torque (in N · m) about the z-axis that is out of the page at the origin in the follow...

A: Given:F1 = 6.0 N, F2 = 4.3 N, F3 = 6.0 N, F4 = 4.1 N.Find the torque.

Q: a.) Calculate A's momentum: before collision: kg-m/s after collision: kg-m/s Make sure you understan...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: What is the balancing vector?

A: Click to see the answer

Q: A mercury thermometer still in use for meteorologyhas a bulb with a volume of 0.780 cm3and a tube fo...

A: The given values are, V0=0.780 cm3d=0.130 mm=0.013 cm∆T=1° C

Q: help

A: From the diagram, we clearly see that the person starts travelling from x=2 m Then, he goes to x=0 m...

Q: The figure shows the top view of an object mass m moving on a uniformly fought horizontal surface. T...

A: Given data: Mass of the object, m=7.15 kg Coefficient of friction, μ=0.644 Radius of the trajectory,...

Q: Given x = ln(u2 − v2), u = t2, v = cos t, find dx/dt.

A: Write x in terms of t , x=lnt22-cos2t =lnt4-cos2t

Q: answer Q 5

A: Given data The track radius is given as r = 7 m.   From the concepts of trigonometry in the inside v...

Q: Directions: Select the best answer for the following questions. Use g = 9.80 m/s? and assume all num...

A: According to the condition of equilibrium, the net torque about the pivot point should be equal to z...

Q: Two forces, F1 and F2, act on the 7.00-kg block shown in the drawing. The angles made by the forces ...

A: Click to see the answer

Q: An electron has ml=2and is in its lowest possibleenergy state. What are the values of n and l for th...

A: Given: An electron has ml=2 and is in its lowest possible energy state. The aim is to determine the ...

Q: The Union Pacific’s Big Boy locomotive could pull 6000-ton trains with a tractive effort (pull) of 6...

A: Given data: Force or pull exerted by the Big Boy locomotive, F=602148 N Displacement caused by the ...

Q: . Your house will be empty for a while in cold weather,and you want to save energy and money. Should...

A: First, we have to understand that every house is different and therefore, optimal setting depends on...

Q: Water flows through a pipe that gradually descends from a height of 6.78 m to the ground. Near the t...

A: According to Bernoulli's equation -  P+ρgh+12ρv2=Constant Applying this equation at top and bottom w...

Q: When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you...

A: When we blow out air keeping your mouth wide open your hand feels hot because the air has the temper...

Q: . (a) Suppose a cold front blows into your locale anddrops the temperature by 40.0 Fahrenheit degree...

A: Fahrenheit to Celsius scale is T0F=180100T0C+32 Given the change in Fahrenheit temperature is  T0Ff-...

Q: The displacement d​ (in meters) of an object at time t​ (in seconds) is given by the following equat...

A: d=10cos(πt)

Q: A brass ball is hanging from a stiff cotton thread. Draw a neat- labelled diagram showing the forces...

A: The free body diagram is shown as,,

Q: Consider a ball on a fixed-length string being whirled in a vertical circular path as shown in the d...

A: Click to see the answer

Q: two linear waves have the same amplitude and speed and otherwise are identical except one half the w...

A: The energy transmitted by a wave is related to the square of its frequency and can be represented as...

Q: Equipotentials are lines along which a. the loads move by themselves b.The electric field is constan...

A: Introduction: The equipotential lines represent a surface of equal potential. In the contour of the ...

Q: The figure shows the top view of an object of mass m moving on a uniformly rough horizontal surface....

A: Given data: Mass of the object, m=7.15 kg Coefficient of friction, μ=0.644  Radius of the trajectory...

Q: A motorcycle is moving at 24 m/s. If the motorcycle is 350kg, what is its kinetic energy?

A: The kinetic energy of the motorcycle is, KE=12mv2

Q: A boat travels 15km/hr in still water. If the boat is headed 60° South of east in a current which is...

A: Given data: Velocity of the boat in still water is, v= 15 km/hr Direction of the water current is so...

Q: A charge of uniform density (50 nC/m) is distributed along the x axis from the origin to the point x...

A: Consider the illustration of the situation described as shown below:     Here, the given charge ext...

Q: A 4.0 nC charge is uniformly distributed along the abscissa axis from x = + 4m to x = + 6m. Which of...

A: Given data *The given charge is q = 4.0 nC = 4.0 × 10-9 C *The charge is uniformly distributed along...

Q: An object is placed 32.7cm from the reflecting surface of a convex mirror having a focal length of -...

A: The given values are, u=32.7 cmf=-10.8 cm