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
professor190 [17]
4 years ago
10

What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a

velocity of 30 meters/second?
Physics
2 answers:
skad [1K]4 years ago
8 0
The answer would be a=5 m/s^2
I hope this helps you, have a great day!
gayaneshka [121]4 years ago
3 0

Answer:

The acceleration of a ball is 5 m/s².

Explanation:

Given that,

Initial velocity = 20 m/s

Time = 2.0 sec

Final velocity = 30 m/s

We need to calculate the acceleration

Using equation of motion

v =u+at

a =\dfrac{v-u}{t}

Where, v = final velocity

u = initial velocity

t = time

Put the value into the formula

a =\dfrac{30-20}{2.0}

a=5\ m/s^2

Hence, The acceleration of a ball is 5 m/s².

You might be interested in
A 26.4 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the ca
MA_775_DIABLO [31]

Answer:

The horizontal component of the force exerted by the hinge on the beam is 47.15 N.

Explanation:

Given data:

Weight of beam = 26.4 kg

Angle between the beam and the cable is 90°

Beam inclination with respect to horizontal with an angle, \theta = 23.4\°

<u>We need to find the horizontal component of the force exerted by the hinge on the beam.</u>

Solution:

Let 'L' be length of the beam, 'T' be tension in the cable , F_{h} be horizontal component of force by the hinge, and F_{v} be vertical component of force by the hinge.

Take counterclockwise torque as positive.

Let us find torques around the hinge.

Torque by tension is given as:

\tau = T \times L  

Torque by the force of gravity is given as:

\tau_g= m g \frac{L}{2}\times cos \theta

Torques by F_{h} and F_{v} are 0 as they act on the hinge itself.

Now, for equilibrium, net torque about the hinge is 0. So,

\tau-\tau_g=0

T L - m g \frac{L}{2}\times \cos(\theta) = 0

Dividing both sides by 'L', we get:

T - m \frac{g}{2}\times \cos \theta = 0

T=m \frac{g}{2} \times cos \theta --------------------(1)

As per question, the cable makes 90° with the horizontal.

So, the net horizontal force is also zero. Therefore,

F_{h} -T cos(90- \theta) = 0

F_h - T sin(\theta) = 0

F_h = T sin(\theta) --------------------------(2)

Plug the value of 'T' from equation (1) into equation (2). This gives,

F_{h} = m \frac{g}{2} \times cos \theta \times sin \theta

F_{h} = 26.4 \times \frac{9.8}{2} \times cos(23.4) \times sin(23.4)

F_{h} = 47.15\ N

Therefore, the horizontal component of the force exerted by the hinge on the beam is 47.15 N.

3 0
3 years ago
When a system absorbs heat from its surroundings it is a(n) ____ process
Nezavi [6.7K]
C. endothermic

An endothermic process takes heat from the surroundings while an exothermic process gives out heat to the surroundings.


8 0
3 years ago
Which term refers to a variable that a scientist adjusts during an experiment?
azamat

Answer:

it’s c

Explanation:

5 0
3 years ago
Which element in the 18th column of the periodic table (shown below) has the largest radius?
Alex17521 [72]

Answer: Rn :)))) no explanation needed

3 0
3 years ago
What is average velocity?
Ber [7]
The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time. According To a website on google 
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the answer to 17 ‐ 12× ‐ 18 ‐ 5×
    15·1 answer
  • What is a watt a unit of?<br> power<br><br> distance<br><br> time<br><br> light
    6·2 answers
  • A point charge is placed at the center of a spherical Gaussian surface. The electricflux ΦEischangedif(a) a second point charge
    5·1 answer
  • This square solenoid has sides length 25 cm, and 100 turns of wire. The resistance is 10 ohms. Find the magnitude of the induced
    8·1 answer
  • The carts are moving on a level, frictionless track. After the collision all three carts stick together. Find the speed of the c
    11·1 answer
  • Name two hormones produced by the endocrine system and how they work with other organs system to maintain homeostasis
    9·1 answer
  • What creates a mechanical turning force in an
    12·1 answer
  • I will give Brainliest please help!​
    8·1 answer
  • Which phenomenon occurs when one wave is superimposed on another ?
    5·2 answers
  • What force is affected when the distance between two objects remains the same and the mass of each object is doubled?.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!