1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Studentka2010 [4]
3 years ago
13

1) Beth rode the Flying Saucer ride at her favorite amusement park. The ride hung from a rod and swung back and forth while simu

ltaneously spinning in a circle. What type of motion did Beth experience?
A) Translational motion
B) Spinning motion
C) Rotational motion
D) Translational and rotational motion


2) Jill and Scott both road their bikes for 30 minutes. Jill traveled 5 kilometers and Scott traveled 10. Calculate each person's speed and tell who rode faster. (s=d/t)

A) Scott had the faster speed since he rode at 10 km/h and Jill was riding at 5 km/h
B) Scott had the faster speed since he rode at 20 k/h while Jill only traveled 10 km/h.
C) Jill was traveling faster. She was riding at a speed of 10 km/h while Scott was traveling at 20 km/h.
D) Both Jill and Scott were traveling at the same speed since they both rode their bikes for 30 minutes.

3) James and Haley went to the speedway to watch cars race around an oval track. One car traveled at a constant speed for the entire race. James told Haley that the car was accelerating during race, but Haley said James was wrong since the car traveled at a constant speed. Who was right and why?

A) Haley was right since the car didn't win the race it was not accelerating.
B) Haley was right because the car traveled at a constant speed. Acceleration is a change in velocity.
C) James was right since the car changed direction during the race.
D) James was right because the car was a race car and all race cars accelerate during a race.
Physics
2 answers:
quester [9]3 years ago
6 0

#1

Since Beth rode the Flying saucer ride which is spinning on its axis while axis is moving to and fro as well, so here Beth will experience two motions in this case

(i) Spinning motion

(ii) Rotational motion

#2

Jill and Scott both traveled for 30 min

So time of motion for both is 0.5 h as we know that 1 h = 60 min

Now from the formula of speed we know that

speed = \frac{distance}{time}

Speed of Jill

v_1 = \frac{5}{0.5} = 10 km/h

speed of Scott

v_2 = \frac{10}{0.5} = 20 km/h

so correct answer is

B) Scott had the faster speed since he rode at 20 k/h while Jill only traveled 10 km/h.

#3

Since we know that <em>acceleration is rate of change in velocity</em>

So here we can say that every motion where velocity changes with time then it is an accelerated motion.

Now change in velocity occurs when either the magnitude will change or its direction will change because here velocity is a vector quantity and it will change with magnitude and direction both.

so here due to oval path the direction of velocity will changes at many points and hence it will be an accelerated motion.

so correct answer is

<em>C) James was right since the car changed direction during the race.</em>


BaLLatris [955]3 years ago
3 0

Answer:

1. Option D) Translational and rotational motion.

2. Option B) Scott had the faster speed since he rode at 20 k/h while Jill only traveled 10 km/h.

3. Option C) James was right since the car changed direction during the race.

Explanation:

1. Thinking process:

The object in question is a flying saucer. So there is an element of rotational motion. Next, the saucer is swung. This means that there are two motions - rotational and translational.

2. Jill = 10 km/h

    Sott = 20 km/h

Hence Scott was faster

3. An object is accelerating when three things take place:

  • the velocity of the object is changing.
  • the direction of the object is changing, e.g. car on a circular race course
  • both the direction and acceleration are changing.

Thus, according to the definition above, James is correct.

You might be interested in
The most abundant element in earth's continental crust (by weight) is____?
sashaice [31]
The answer is A. Oxygen
8 0
3 years ago
Read 2 more answers
Will a series circuit work if there are two batteries and one light bulb? Help asappp please!
Dmitry_Shevchenko [17]

Answer:

Doubling the voltage in this arrangement both doubles the voltage drop across the resistor and the current through it. The bulb will be much brighter.

7 0
3 years ago
A pitcher throws a 0.14-kg baseball toward the batter so that it crosses home plate horizontally and has a speed of 42 m/s just
kykrilka [37]

Answer

given,

mass of base ball = 0.14 kg

speed before it made the contact with the ball (V i) = 42 m/s

speed after batter hit the ball(V f) = - 48 m/s

a)                                            

impulse = change in momentum

             = m\times (V_f-V_i)      

             =0.14\times (-48-42)

             = -12.6 Kg m/s

Magnitude of impulse = 12.6 Kg m/s

b)                                                        

Force = \dfrac{impulse}{time}

          =  \dfrac{12.6}{0.005}

Force = 2520 N

5 0
3 years ago
What kind of eruption is likely to occur in a volcano having magma that is low in silica
Masja [62]
A volcano erupts quietly if it's magma is low on silica. Low silica magma will be very thin, runny, and will flow easily, so the gases in the magma will bubble out gently. Hope this helps!:)
3 0
3 years ago
Read 2 more answers
for any object suspended by any number of ropes, wires, or chains, how is the total amount of tension (tension in each rope adde
Sveta_85 [38]

Answer:

To calculate the tension on a rope holding 1 object, multiply the mass and gravitational acceleration of the object. If the object is experiencing any other acceleration, multiply that acceleration by the mass and add it to your first total.

Explanation:

The tension in a given strand of string or rope is a result of the forces pulling on the rope from either end. As a reminder, force = mass × acceleration. Assuming the rope is stretched tightly, any change in acceleration or mass in objects the rope is supporting will cause a change in tension in the rope. Don't forget the constant acceleration due to gravity - even if a system is at rest, its components are subject to this force. We can think of a tension in a given rope as T = (m × g) + (m × a), where "g" is the acceleration due to gravity of any objects the rope is supporting and "a" is any other acceleration on any objects the rope is supporting.[2]

For the purposes of most physics problems, we assume ideal strings - in other words, that our rope, cable, etc. is thin, massless, and can't be stretched or broken.

As an example, let's consider a system where a weight hangs from a wooden beam via a single rope (see picture). Neither the weight nor the rope are moving - the entire system is at rest. Because of this, we know that, for the weight to be held in equilibrium, the tension force must equal the force of gravity on the weight. In other words, Tension (Ft) = Force of gravity (Fg) = m × g.

Assuming a 10 kg weight, then, the tension force is 10 kg × 9.8 m/s2 = 98 Newtons.

7 0
3 years ago
Other questions:
  • A force of 50 pounds is directed 30 from the horizontal, find the vector that represents this force.
    12·1 answer
  • Magnetic Field from a Current Element An electron is moving through a uniform electric field, ????????0, parallel to an infinite
    9·1 answer
  • To travel from australia to south africa which direction would you go
    14·1 answer
  • The air sealed between two panes of glass in some windows helps to _____.
    5·2 answers
  • A diver wants to jump from a board, the initial height is 10 meters and he wants to reach a horizontal distance of 2 meters. Wha
    5·1 answer
  • Electric charges that are different attract each other.
    5·2 answers
  • Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above i
    6·1 answer
  • In Science, a hypothesis must be _______________.
    14·1 answer
  • Ali is sitting on the chair, identify the forces acting on him.
    10·2 answers
  • you want to describe the harmonic motion of a swing. you find out that it takes 2 seconds for the swing to complete one cycle. w
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!