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
Maksim231197 [3]
3 years ago
12

Which two quantities below can be used to calculate average speed?

Physics
1 answer:
defon3 years ago
6 0
Change of position and time
You might be interested in
A 7450 kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.35 m/s2 and feels no appreci
bagirrra123 [75]

Answer:

a) 520m

b) 10.30 s

c) 100,95 m/s

Explanation:

a) According the given information, the rocket suddenly stops when it reach the height of 520m, because the engines fail, and then it begins the free fall.

This means the maximum height this rocket reached before falling  was 520 m.

b) As we are dealing with constant acceleration (due gravity) g=9.8 \frac{m}{s^{2}} we can use the following formula:

y=y_{o}+V_{o} t-\frac{gt^{2}}{2}   (1)

Where:

y_{o}=520 m  is the initial height of the rocket (at the exact moment in which it stops due engines fail)

y=0  is the final height of the rocket (when it finally hits the launch pad)

V_{o}=0 is the initial velocity of the rocket (at the exact moment in which it stops the velocity is zero and then it begins to fall)

g=9.8m/s^{2}  is the acceleration due gravity

t is the time it takes to the rocket to hit the launch pad

Clearing t:

0=520 m+0-\frac{9.8m/s^{2} t^{2}}{2}   (2)

t^{2}=\frac{-520 m}{-4.9 m/s^{2}}   (3)

t=\sqrt{106.12 s^{2}   (4)

t=10.30 s   (5)  This is the time

c) Now we need to find the final velocity V_{f} for this rocket, and the following equation will be perfect to find it:

V_{f}=V_{o}-gt  (6)

V_{f}=0-(9.8 m/s^{2})(10.30 s)  (7)

V_{f}=-100.95 m/s  (8) This is the final velocity of the rocket. Note the negative sign indicates its direction is downwards (to the launch pad)

7 0
3 years ago
El vector a tiene componented ax= 2.70 cm, ay=2.25 cm; y el vector b tiene componentes bx= 0.30 cm, by= 1.75 cm. Calcular las co
Talja [164]

Answer:

Explanation:

Given that,

A vector A has x component to be 2.7cm and y component to be 2.25cm

Then,

A = 2.7•i + 2.25•j

A vector B has x component of 0.30cm and y component of 1.75cm

B = 0.3•i + 1.75•j

So, we want to find A+B

Addition of vectors

Generally

(a•i + b•j) + (c•i + d•j) = (a+c)•i +(b+d)•j

Vectors are added component wise.

So,

A + B = (2.7•i + 2.25•j) + (0.3•i + 1.75•j)

A + B = (2.7 + 0.3)•i + (2.25 + 1.75)•j

A + B = 3•i + 4•j

We can also find it magnitude and direction

Generally,

A = a•i + b•j

|A| = √(a²+b²)

<A = arctan(b/a)

So,

|A+B| = √(3²+4²) = √9+16 = √25

|A+B| = 5

And it's direction

< = arctan(y/x)

< = arctan(4/3)

< = 53.13°

3 0
3 years ago
A horizontal rope is tied to a 58.0 kg box on frictionless ice. what is the tension in the rope the box is at rest
alexandr402 [8]
48kg is the tension in the rope
3 0
3 years ago
Suppose the collision speed is 20 mph and the rebound speed is 5 mph. The energy ratio is?
kumpel [21]

Answer:

The energy ratio is 16:1.

Explanation:

The kinetic energy of the 20mph object is

K_1 = \dfrac{1}{2}m(20mph)^2,

and the kinetic of the same abject at 5mph is

K_2 = \dfrac{1}{2}m(5mph)^2;

therefore, the ratio of K_1 to K_2 is

$\frac{K_1}{K_2} = \frac{\dfrac{1}{2}m(20mph)^2}{ \dfrac{1}{2}m(5mph)^2} = \frac{(20mph)^2}{(5mph)^2}   =\frac{16}{1}  $

Thus, the energy ratio is K_1:K_2 = 16:1.

3 0
2 years ago
Name the principal on which a rocket works
Andre45 [30]
The rocket works on the principal of action and reaction. Newton's third law of motion.
5 0
3 years ago
Other questions:
  • One kilowatt-hour is equal to which of these values?
    13·2 answers
  • Can you please help me with these
    12·1 answer
  • What is the action force of a flying bird?
    9·1 answer
  • Objects in the same container eventually reach the same temperature. When you go into a room and touch a piece of metal in that
    5·1 answer
  • Lana does her homework as soon as she can after class, but she still doesn't undertand everything she suppose to learn. what cou
    11·2 answers
  • a car going 22 m/s accelerates to pass a truck. Five seconds later the car is going 35 m/s. Calculate the acceleration of the ca
    15·1 answer
  • 4. What is the tan gential velocity of an object moving in a path of radius 2m with an angular velocity of
    12·1 answer
  • Only 5 question plz answer
    15·2 answers
  • Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. The yello
    9·1 answer
  • A 5 kg block is being pushed horizontally across a level surface at a constant velocity. What is the magnitude of the Normal for
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!