Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Physics Expert

1. A 20 N horizontal force is applied to a 4.0 kg box. The box moves a horizontal distance of 3.0 meters. The work done by the 20 N forces is...?

1. 60 J

2. 80 J

3. 100 J

4. 120 J

5. 140 J

2. A roller coaster is towed up an incline at a stable speed of 0.50m/s by a chain parallel to the surface of the incline. The slope is 3.0 percent, which means that the elevation increases by 3 m for every 100 m of distance along the surface. The mass of the roller coaster is 400 kg. Neglect friction, what is the magnitude of the force exerted on the roller coaster through the chain?

1. 510 N

2. 205 N

3. 120 N

4. 335 N

5. 80 N

3. A runner runs three-quarters of the way around a circular track, of radius 60.0 m, while she collides with another runner and trips. (a) How far had the runner travelled on the track before the collision? (b) What was the magnitude of the displacement of the runner from her starting position while accident occurred?

(a) 265 m (b) 93.4 m

(a) 278 m (b) 86.8 m

(a) 292 m (b) 78.6 m

(a) 283 m (b) 84.9 m

4. An arrow is shot into the air at an angle of 60.0° above the horizontal with the speed of 20.0 m/s. (a) what are the x- and y-components of the velocity of the arrow 3 s after it leaves the bowstring? (b) What is the displacement of the arrow in the y-direction throughout the 3.0-s interval?

(a) 10.0 m/s and -12 m/s (b) 8 m

(a) 12.0 m/s and -10 m/s (b) 8 m

(a) 10.0 m/s and -12 m/s (b) 6 m

(a) 12.0 m/s and -10 m/s (b) 6 m

5. Switch these to radian measure: (a) 30.0°, (b) 135°, (c) 1/4 revolutions.

(a) 0.501 rad; (b) 2.36 rad; (c) or 1.05 rad

(a) 0.524 rad; (b) 2.27 rad; (c) or 1.57 rad

(a) 0.524 rad; (b) 2.36 rad; (c) or 1.57 rad

(a) 0.501 rad; (b) 2.27 rad; (c) or 1.05 rad

(a) 0.524 rad; (b) 2.36 rad; (c) or 1.05 rad

6. A highway curve has a radius of 122 m. At what angle must the road be banked so that a car travelling at 26.8 m/s (60 mph) has no tendency to skid sideways on road? [Hint: No tendency to skid means the frictional force is zero.]

1. 25°

2. 22°

3. 31°

4. 38°

7. A small body of mass 0.5kg is attached by a 0.50m long cord to a pin set into the surface of a frictionless table top. The body moves in a circle on the horizontal surface with the speed of 2.0π m/s. (a) what is the magnitude of the centripetal acceleration of the body? (b) What is the tension in the cord?

(a) 79 m/s2 ; (b) 37 N

(a) 79 m/s2 ; (b) 39 N

(a) 65 m/s2 ; (b) 33 N

(a) 65 m/s2 ; (b) 37 N

(a) 79 m/s2 ; (b) 33 N

8. The tension in the horizontal (? =0) towrope pulling a water-skier is 240 N while the skier moves due west a distance of 54m. How much work does towrope do on the water-skier?

1. 10 kJ

2. 4.4 kJ

3. 18 kJ

4. 13 kJ

9. A roller coaster car (mass = 988 kg including passengers) is about to roll down a track (the figure below). The diameter of the circular loop is 20m and the car starts out from rest 40m above the lowest point of the track. Overlook friction and air resistance and assume g = 9.81 m/s2. (a) At what speed does the car reach the top of loop?

(a) 11.4 m/s

(a) 21.6 m/s

(a) 12.9 m/s

(a) 9.9 m/s

(a) 19.8 m/s

10. A sports car travelling along a straight line increases its velocity from 20.0 mi/h to 60.0 mi/h. What is the ratio of the final to the initial magnitude of its momentum?

1. 3.00

2. 6.00

3. 4.00

4. 2.00

5. 5.00

Physics, Academics

  • Category:- Physics
  • Reference No.:- M917213

Have any Question? 


Related Questions in Physics

A rock of 150 kg is found at the top of a mountain that is

A rock of 150 kg is found at the top of a mountain that is 1100-m high. Find the potential energy with respect to the bottom of the mountain (g = 9.8 m/s 2 ).

Assignment deviant behavior violates standards and

ASSIGNMENT: Deviant behavior violates standards and expectations of a group social norm. Reflect on a time when you violated a widely shared and understood norm of your society. What was the norm? What was the violation? ...

In a time of t seconds a particle moves a distance of s

In a time of t seconds, a particle moves a distance of s meters from its starting point, where s = 4t 3 . (a) Find the average velocity between t = 0 and t = h if: (i) h = 0.1, (ii) h = 0.01, (iii) h = 0.001. (b) Use you ...

If the a1n-si schottky barrier contact shown in given

If the A1/n-Si Schottky barrier contact shown in given Figure was used as the ohmic contact to the n-Si surface of the 1957SNS p+/n diode, how would the forward I-V characteristics look? Sketch it both on linear-linear a ...

1 give a simple reason based on device physics or charge

1. Give a simple reason based on device physics or charge store concept to show that the speed up of the recovery during switch-off transient is given by the ratio, J F /J R . Afterwards, show this also mathematically us ...

The input to a channel q is a word of 8 bits the output is

The input to a channel Q is a word of 8 bits. The output is also a word of 8 bits. Each time it is used, the channel flips exactly one of the transmitted bits, but the receiver does not know which one. The other seven bi ...

An interphase convective mass-transfer process involves the

An interphase convective mass-transfer process involves the transfer of the industrial contaminant, methylene chloride (species A), between air and water at 20°C and 2.20 atm total system pressure. Air is the inert carri ...

A pendulum having a bob of mass m is hanging in a ship

A pendulum having a bob of mass m is hanging in a ship sailing along the equator from east to west. When the ship is stationary with respect to water the tension in the string is T0. (a) Find the speed of the ship due to ...

Dependence on crossover mechanism in the simple model of

Dependence on crossover mechanism. In the simple model of sex, each bit is taken at random from one of the two parents, that is, we allow crossovers to occur with probability 50% between any two adjacent nucleotides. How ...

How can you use a coin to create a random ranking of 3

How can you use a coin to create a random ranking of 3 people? Construct a solution that uses exact sampling. For example, you could apply exact sampling to a Markov chain in which the coin is repeatedly used alternately ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen