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
kotegsom [21]
3 years ago
13

A rock is thrown horizontally from a bridge with a velocity of 17.0 m/s. It takes the rock 3.0 s to strike the water below. What

is the magnitude of the velocity of the rock just before it hits the water
Physics
1 answer:
zalisa [80]3 years ago
7 0

Answer:

V= 33.98 m/s

Explanation:

Given that

Horizontal speed ,u= 17 m/s

Time taken by rockets to strike the water ,t= 3 s

We know that acceleration due to gravity ,g= 9.81 m/s²

There is no any acceleration in the horizontal direction that is why the horizontal veloity will remain constant.

In the vertical direction

vy = uy+ g t

Initial velocity in vertical direction is 0 m/s.

vy= 0+ 9.81 x 3

vy = 29.43 m/s

The resultant velocity

V=\sqrt{v_y^2+u^2}

V=\sqrt{29.43^2+17^2}\ m/s

V= 33.98 m/s

You might be interested in
The uniform 100-kg beam is freely hinged about its upper end A and is initially at rest in the vertical position with theta = 0.
max2010maxim [7]

Answer:

ac = 2.86 m / s²

Explanation:

Image can detail the system to determine the force in the FA to understand the system into the applicated force

m = 100 kg ,  L = 3 m

∑ F = 0 ⇒ Ay - 100 kg + P * cos (45) = 0

Ay = 768.86 N

∑ Mₐ = α * I ₐ

I ₐ = m * L² / 3  ⇒  I ₐ = 100 kg * 4² m / 3

Replacing

P * sin (45) * 3 = α * 100 kg * 4² m / 3  

α = 1.193 rad / s²

ac = α *2    ⇒  ac = 1.193 rad / s²  * 2

ac = 2.86 m / s²

4 0
3 years ago
Is the answer C or B​
inessss [21]

Answer:

c

Explanation:

though c is wider it has more water.

6 0
3 years ago
Read 2 more answers
What happens to jetstream’s as they get closer to the equator
MAVERICK [17]

Answer:They stop because jet streams follow boundaries between hot and cold air.

Explanation:

6 0
3 years ago
Read 2 more answers
A group of tissues working together to perform a similar function.
inn [45]

Answer:

organ

Explanation:

7 0
3 years ago
Read 2 more answers
Is it possible to have sex then after a week you get your periods and get pregnant?
mrs_skeptik [129]

Answer:

Yes it stilll possible

Explanation:

7 0
2 years ago
Other questions:
  • 1. This image shows the various forces acting on a block of rock situated on a rock slope. What does arrow 4 represent?
    13·2 answers
  • The full range of frequencies of electromagnetic radiation is called
    6·2 answers
  • What is the fundamental source of all energy in the universe
    11·1 answer
  • Gasoline flows in a long, underground pipeline at a constant temperature of 15o C (rho = 680 kg/m3 ; ν = 4.6 × 10-7 m2 /s). Two
    6·1 answer
  • To practice Problem-Solving Strategy 21.1 Coulomb's Law. Three charged particles are placed at each of three corners of an equil
    15·1 answer
  • An avant-garde composer wants to use the Doppler effect in his new opera. As the soprano sings, he wants a large bat to fly towa
    14·1 answer
  • Which graph shows the fastest speed?
    9·1 answer
  • a red kangaroo can hop at speeds of 65 km/hr. how much time will it take the kangaroo to hop 0.25 km at that speed?
    10·1 answer
  • What is the formula of the compound formed when Beryllium reacts with the sulfate ion?
    14·1 answer
  • Which types of forces exist between the two protons in a helium nucleus?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!