Ask Question, Ask an Expert


Ask Physics Expert

1) John throws a baseball from outfield from shoulder height, at the initial velocity of 29.4 m/s at an initial angle of 30.0 regarding the horizontal. The ball is in its trajectory for a total interval of 3s before third baseman catches it at an equal shoulder-height level. (Assume air resistance negligible) What is the ball's horizontal displacement?
a. 76.4 m
b. 38.2 m
c. 57.3 m
d. 66.7 m
e. Zero

2) A 7.00 kg bowling ball experiences a net force of 5 N. What would be its acceleration?
a. 35 m/s2
b. 7.0 m/s2
c. 5.0 m/s2
d. 0.71 m/s2
e. 0.71 m/s2
f. 0.52 m/s2

3) Two ropes are attached to a 40 kg object. The first rope applies a force of 25 N and the second, 40N. If the two ropes are perpendicular to each other, what is the resultant acceleration of an object?
a. 1.2 m/s2
b. 3.0 m/s2
c. 5.0 m/ s2
d. 25 m/s2
e. 47 m/s2

4) The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.0 m/s2 on the moon?
a. 1.3 N
b. 20 N
c. 33 N
d. 120 N
e. 130 N

5) As I slide the box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
a. Greater than the tension will be if box were stationary.
b. Greater than the weight of box.
c. Equal to the weight of box.
d. Less than the weight of box.
e. Less than the tension would be if box were stationary.

6) A sled weighs 100N. It is held in place on a frictionless 20mgcos slope by a rope attached to a stake at the top; the rope is parallel to slope. What is the normal force of slope acting on the sled?
a. 94 N
b. 47 N
c. 37 N
d. 34 N
e. 28 N

7) A 500-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 10.0 with the horizontal. What is the tension in the rope?
a. 1 440 N
b. 1 000 N
c. 500 N
d. 2 900 N
e. 2 100 N

8) Find out the tension in an elevator cable if the 1 .000 kg elevators is descending with an acceleration of 1.8 m/s2, downward.
a. 5 700 N
b. 8 000 N
c. 9 800 N
d. 11 600 N
e. 12 800 N

9) A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
a. 3.0
b. 0.15
c. 0.28
d. 0.31
e. 2.5

10) The unit of work, joule, is dimensionally the similar as:
a. Newton / second
b. Newton / kilogram.
c. Newton - second
d. Newton - meter.
e. Newton / meter.

Physics, Academics

  • Category:- Physics
  • Reference No.:- M917991

Have any Question? 

Related Questions in Physics

Dry air flowing at a velocity of 15 ms enters a 6-mlong

Dry air, flowing at a velocity of 1.5 m/s, enters a 6-mlong, 0.15-m-diameter tube at 310 K and 1:013 × 10 5  Pa. The inner surface of the tube is lined with a felt material (diameter-to rough ness ratio, D/e, of 10,000) ...

Fill in the details in the proof of lubys main theorem that

Fill in the details in the proof of Luby's main theorem, that receiving K' = K +2 ln(S/δ)S checks ensures that all the source packets can be recovered with probability at least 1 - δ.

Wastewater containing solute a at a concentration of 10

Wastewater containing solute A at a concentration of 1:0 × 10 -3  g mol=m 3  enters an open tank at a volumetric flow rate of 0:2 m 3 /min, and exits at the same rate. Solute A transfers from the wastewater in the open t ...

Adaptive basis functions alternatively we might make a

Adaptive basis functions. Alternatively, we might make a function y(x) from basis functions that depend on additional parameters included in the vector w. In a two-layer feed forward neural network with nonlinear hidden ...

Imagine that we reparameterize a positive variable x in

Imagine that we reparameterize a positive variable x in terms of its cube root, u = x 1/3 . If the probability density of x is the improper distribution 1/x, what is the probability density of u?

Why is it important to study global demographywhat are the

Why is it important to study global demography? What are the forces behind population change? Malthusian Theory: A flawed prediction, or a premonition of times to come? 300 words min. NO PLAGIARISM PLEASE.

Let w be the amount of water in gallons in a bathtub at

Let W be the amount of water, in gallons, in a bathtub at time t, in minutes. (a) What are the meaning and units of dW/dt? (b) Suppose the bathtub is full of water at time t 0 , so that W(t 0 ) > 0. Subsequently, at time ...

A rocket of mass 10000 kg undergoes an acceleration of 2

A rocket of mass 10,000 kg undergoes an acceleration of 2 m/s 2 a) Find the force supplied by the rocket's engines. b) Find the rocket's speed two seconds after it leaves the ground. c) How high will it be in 5 secs unde ...

A man is sitting on the shore of a river he is in the line

A man is sitting on the shore of a river. He is in the line of a 1.0 m long boat and is 5"5 m away from the Centre of the boat. He wishes to throw an apple into the boat. If he can throw the apple only with a speed of 10 ...

Describe an arithmetic coding algorithm to encode random

Describe an arithmetic coding algorithm to encode random bit strings of length N and weight K (i.e., K ones and N -K zeroes) where N and K are given. For the case N =5, K =2, show in detail the intervals corresponding to ...

  • 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