2 years ago

Which of the following equations describe the 2nd law of motion?

Physics

2 answers:

Paladinen [302]2 years ago

7 0

Answer:

b. force= mass *acceleration

Explanation:

Sever21 [200]2 years ago

4 0

Answer:

b. F = m × a is the correct answer.

You might be interested in

A sled of mass m is coasting on the icy surface of a frozen river. While it is passing under a bridge, a package of equal mass m

sweet [91]

Answer:B

Explanation:

Given

mass of Sled is m

another package of mass m is thrown on it

Suppose u be the initial velocity of sled

conserving momentum

$mu=2mv$

$v=\frac{u}{2}$

where v is the final velocity

Initial kinetic energy $=\frac{1}{2}mu^2$

Final Kinetic Energy $=\frac{1}{2}(2m)\cdot (\frac{u}{2})^2$

Final Kinetic Energy $=\frac{1}{2}\times \frac{1}{2}mu^2$

Final kinetic Energy is half of initial

5 0

2 years ago

What is the density to the object g/cm3

alexdok [17]

Should be 1.4, I hope this helps you out

6 0

1 year ago

If there was no frictional force acting on the ball in question 2 what would happen to the player? Use inertia and Newton’s 1st

laila [671]

Newwton's law of inertia states that an object will not be able to move unless force is applied to it

6 0

2 years ago

The resistance of an object to change its dynamic state called

aleksandr82 [10.1K]

Inertia is the correct answer!

5 0

2 years ago

Why is velocity squared in kinetic energy and mass multiplied by 1/2?

maxonik [38]

Remember the definition of work done.
Work done is force(F) times displacement(x)
∴ W = F.Δx
According to Newton's 2nd law of motion,

F = ma
∴ W = ma.Δx ---- (i)
Using the kinematical equation v²-u² = 2ax,
aΔx = (v²-u²)/2

Plug this value in (i),

∴W = m[ $\frac{v^{2}-u^{2} }{2}$ ]
∴W = $\frac{mv^{2} }{2} - \frac{mu^{2} }{2}$

Which is nothing but change in kinetic energy.
That is how kinetic energy is derived

5 0

2 years ago