All categories

3 years ago

An elephant travels 16metes to the left in 20s, what is the average velocity?

Physics

1 answer:

SCORPION-xisa [38]3 years ago

4 0

Answer:

S=16metes

t=20sec

V=?

V=S/t

V=16/20

V=0.8m/s

You might be interested in

A car mass 600kg starts from rest moving uniform acceleration 0.2 m/s^2 after 60 seconds collides with stationary pick up van of

nlexa [21]

Answer:

The given phenomenon supports the Principle of Conservation of momentum.

Explanation:

law of conservation of momentum

Initial Momentum = Final Momentum

So, first we calculate initial momentum of the system:

Initial Momentum = m1*u1 + m2*u2

and we are given

m1 = mass of car = 600 kg

m2 = mass of van = 400 kg

u1 = Initial Speed of Car

to find the initial speed we use equation of motion

Vf = Vi + at

Vf = 0 m/s + (0.2 m/s²)(60 s)

Vf = u₁ = 12 m/s

u₂ = Initial Speed of Van = 0 m/s

Therefore,

Initial Momentum = (600 kg)(12 m/s) + (400 kg)(0 m/s)

Initial Momentum = 7200 Ns .........(1)

final momentum = m₁v₁ + m₂v₂

where,

v₁ = v₂ = final speed of car+van (both locked ) = 7.2 m/s

Therefore,

Final Momentum = (600 kg)(7.2 m/s) + (400 kg)(7.2 m/s)

Final Momentum = 7200 Ns -------- (2)

on comparing (1) and (2)

Initial momentum = Final Momentum

Hence, the phenomenon of the system supports the principle of conservation of momentum.

6 0

3 years ago

The bonds of the products store 22kJ more energy than the bonds of the reactants. How is energy conserved during this reaction?

babunello [35]

The answer should be C.

8 0

2 years ago

Where the value of g is maximum

fomenos

Answer:

At sea Level

Explanation:

At sea level is mimum

6 0

2 years ago

Read 2 more answers

James Bond is trying to escape his enemy on a speedboat but

SVEN [57.7K]

Answer:

100 m/s

Explanation:

Mass the mass of Bond's boat is m₁. His enemy's boat is twice the mass of Bond's i.e. m₂ = 2 m₁

Initial speed of Bond's boat is 0 as it won't start and remains stationary in the water. The initial speed of enemy's boat is 50 m/s. After the collision, enemy boat is completely stationary. Let v₁ is speed of bond's boat.

It is the concept of the conservation of momentum. It remains conserved. So,

$m_1u_1+m_2u_2=m_1v_1+m_2v_2$

Putting all the values, we get :

$0+(2m_1)50=m_1v_1+(2m_2)(0)\\\\100m_1=m_1v_1\\\\v_1=100\ m/s$

So, Bond's boat is moving with a speed of 100 m/s after the collision.

3 0

3 years ago

The driver of a car traveling at 30.5 m/s slams on the brakes so that the car undergoes a constant acceleration, skidding to a c

dolphi86 [110]

Answer:

-6.8 m/s²

Explanation:

Given:

v₀ = 30.5 m/s

v = 0 m/s

t = 4.5 s

Find: a

a = (v − v₀) / t

a = (0 m/s − 30.5 m/s) / 4.5 s

a = -6.8 m/s²

4 0

3 years ago

An elephant travels 16metes to the left in 20s, what is the average velocity?​

An elephant travels 16metes to the left in 20s, what is the average velocity?