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
Sloan [31]
3 years ago
6

A 57-gram tennis ball moving at 70 miles per hour is hit with a 110-gram tennis racquet moving at 60 miles per hour. Which state

ment best compares the total amounts of mass and energy before and after impact? A. Because the velocities of the ball and racquet are unequal, there is more mass and energy after impact than there is before impact. B. Because the velocities of the ball and racquet are unequal, there is less mass and energy after impact than there is before impact. C. Because neither mass nor energy are conserved, the total amounts of mass and energy are different before and after impact. D. Because mass and energy are both conserved, the total amounts of mass and energy are the same before and after impact.
Physics
1 answer:
Whitepunk [10]3 years ago
5 0

Answer:

D. Because mass and energy are both conserved, the total amounts of mass and energy are the same before and after impact.

Explanation:

As we know that, the energy in motion is Kinetic Energy mathematically given as:

KE=\frac{1}{2} m.v^2

<u>Now, according to the law of conservation of energy:</u>

\frac{1}{2} m_1.u_1^2+\frac{1}{2} m_2.u_2^2=\frac{1}{2} m_1.v_1^2+\frac{1}{2} m_2.v_2^2

where:

m_1\ \&\ m_2 mass of racquet and ball respectively and u_1\ \&\ u_2 are their respective initial velocities.

v_1\ \&\ v_2 are the respective final velocities.

<u>Also the law of conservation of momentum is applicable in this case:</u>

m_1.u_1+ m_2.u_2= m_1.v_1+m_2.v_2

In this case the velocity of the lighter mass will get increases in the final condition.

You might be interested in
Explain how an alpine glacier can change the topography of a mountainous area
igor_vitrenko [27]
<span>An alpine glacier can change the topography of a mountainous area through Glacial Erosion and Glacial Deposition. Glaciers are agents of erosion, it can pick up and carry large rocks and sediments. In the process, a deep cavity or hole can form when the glacier plucks a big rock from where it passed. Glaciers have shaped many Mountain Ranges and have created distinct landforms by its erosion process.  In Glacial Deposition, as glaciers melt, it deposits all that it carried and a landform is developed.</span>
7 0
3 years ago
What is the difference between light energy and heat energy​
MrRissso [65]

ANSWER:

What is the difference between heat and light? - Physics Stack ... Heat and light are different but they are both forms of energy. Heat is a form of kinetic energy contained in the random motion of the particles of a material. Light is a form of electromagnetic energy. As with other forms of energy, heat energy can be transformed into light energy and vice versa.

4 0
3 years ago
HELP!!!!!! Need Help !!!
denis23 [38]

Answer:

its y

Explanation:

3 0
2 years ago
A charged particle is placed in an external magnetic field and it is moving in a circular path of radius 26m.The magnetic force
ElenaW [278]

Answer:

208 Joules

Explanation:

The radius of the circular path the charge moves, r = 26 m

The magnetic force acting on the charge particle, F = 16 N

Centripetal force, F_c = m·v²/r

Kinetic energy, K.E. = (1/2)·m·v²

Where;

m = The mass of the charged particle

v = The velocity of the charged particle

r = The radius of the path of the charged particle

Whereby the magnetic force acting on the charge particle = The centripetal force, we have;

F = F_c = m·v²/r = 16 N

(1/2) × r × F_c = (1/2) × r × m·v²/r = (1/2)·m·v² = K.E.

∴ (1/2) × r × F_c = (1/2) × 26 m × 16 N =  = (1/2)·m·v² = K.E.

∴ 208 Joules = K.E.

The kinetic energy of an particle moving in the circular path, K.E. = 208 Joules.

4 0
2 years ago
Explain what is happening to the skater and why it is happening. (with friction)
Svetlanka [38]

Answer:

the skater is falling bc of gravity and kinetic energy

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • The Earth’s internal __________ source provides the energy for our dynamic planet, providing it with the driving force for on-go
    7·1 answer
  • What is the magnitude of the net torque on the pulley about the axle?
    10·1 answer
  • A water tank is in the shape of an inverted cone with depth 10 meters, and top radius 8 meters. Water is flowing into the tank a
    8·1 answer
  • What formula can be used to calculate [H30+]?
    11·1 answer
  • A car traveling 90km/hr is 100 m behind a truck traveling 50km/hr. How long will it take the car to reach the truck?
    15·2 answers
  • What is the relationship between mass and weight?
    12·1 answer
  • A car has a mass of 1500 kg. If the force acting on the car is 6750 N to the east, what is the car’s acceleration?
    12·1 answer
  • A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the forcerequired to keep
    11·1 answer
  • A student attaches a block to a vertical spring of unknown spring constant so that the block-spring system will oscillate if the
    5·2 answers
  • How are kinetic energy potential energy and thermal energy in a substance related?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!