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
Brilliant_brown [7]
2 years ago
13

A hockey puck is hit on a frozen lake and starts moving with a speed of 13.60 m/s. Exactly 6.2 s later, its speed is 7.20 m/s. (

a) What is the puck's average acceleration?
Physics
1 answer:
stellarik [79]2 years ago
3 0

Answer:

-1.03 m/s²

Explanation:

Acceleration: This can be defined as the rate of change of velocity. The S. I unit of acceleration is m/s².

Mathematically, acceleration is expressed as

a = (v-u)/t ........................ Equation 1

Where a = acceleration, v = final velocity, u = initial velocity, t  = time.

Given: u = 13.60 m/s, v = 7.20 m/s t = 6.2 s.

Substituting into equation 2

a = (7.20-13.60)/6.2

a = -6.4/6.2

a = -1.03 m/s²

Note: a is negative because, the hockey puck is decelerating.

Hence the average acceleration = -1.03 m/s²

You might be interested in
What is the required force to bring a 1550 kg vehicle moving at 32 m/s to a stop in a distance of 45 m?
Vilka [71]
The answer is 9 i think.
8 0
3 years ago
A certain nuclear power plant is capable of producing 1.2×10^9 W of electric power. During operation of the reactor, mass is con
alukav5142 [94]

Answer:

0.00016 kg

Explanation:  

Given:

Power = P = 1.2 × 10⁹ Watts

Power =  work done / Time

efficiency = 0.30

Input power = 1.2 × 10⁹ / 0.30 =  4  × 10⁹ W

Energy =  4  × 10⁹ x 60 x 60 = 1.44 x 10¹³ joules

E = m c² , where c is the speed of light and m is the mass.

⇒ mass = m = E / c²  = (1.44 x 10¹³) / (3 × 10⁸ )²

                                   = 0.00016 kg

6 0
3 years ago
A 0.03 kg golf ball is hit off the tee at a speed of 34 m/s. The golf club was in contact with the ball for 0.003 s. What is the
Liula [17]

Answer:

The average force on ball by the golf club is 340 N.

Explanation:

Given that,

Mass of the golf ball, m = 0.03 kg

Initial speed of the ball, u = 0

Final speed of the ball, v = 34 m/s

Time of contact, \Delta t=0.003\ s

We need to find the average force on ball by the golf club. We know that the rate of change of momentum is equal to the net external force applied such that :

F=\dfrac{\Delta p}{\Delta t}\\\\F=\dfrac{mv-mu}{\Delta t}\\\\F=\dfrac{mv}{\Delta t}\\\\F=\dfrac{0.03\ kg\times 34\ m/s}{0.003\ s}\\\\F=340\ N

So, the average force on ball by the golf club is 340 N.

4 0
3 years ago
Koi to inbox kr do......​
rosijanka [135]

Answer:

<h2>Tum karo yaar </h2>

<h2>INBOX.....</h2>

<h2>MARK AS A BRAINLIEST</h2>

<h2>PLEASE☆☆☆</h2>

4 0
2 years ago
Read 2 more answers
Please help!
Yanka [14]

Answer:

V=3.57 × 10^6 m/s

hope it is helpful..

7 0
2 years ago
Other questions:
  • A very massive object A and a less massive object B move toward each other under the influence of gravity. Which force, if eithe
    12·1 answer
  • Fill in the blank below: In a _______________ digestive system, digestion takes place outside of the cells in a series of tubes.
    6·1 answer
  • A car weighing 15,000 n is speeding down the highway at 90 km/h. what is its momentum?
    11·2 answers
  • an ideal gas system undergoes an adiabatic process in which it expands and does 20 J of work on its environment. how much energy
    14·1 answer
  • N asteroid of mass 58,000 kg carrying a negative charge of 15 μc is 180 m from a second asteroid of mass 52,000 kg carrying a ne
    5·2 answers
  • How can philosophy help you become a productive citizen<br>​
    13·1 answer
  • Potential energy is energy due to the:
    8·1 answer
  • Which of the following equations illustrates the law of conservation of<br> matter?
    9·1 answer
  • The definition of agility
    5·1 answer
  • What do ethical guidelines for research with human subjects mean?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!