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
Tems11 [23]
2 years ago
11

A stone is projected horizontally from the

Physics
1 answer:
Nadya [2.5K]2 years ago
6 0

Answer:

80 m tall

Explanation:

*** EDITED ***      (I left out the '1/2' in the equation....D'Oh!)

It was descending 4 seconds  ...because it landed 20 m away  (at 5 m/s  ...so 4 seconds)

displacement =<u> 1/2</u>   a t^2

                        = 1/2 * 10 ( 4)^2 = 80 m  tall

You might be interested in
If a fish is trying to capture an insect hovering above the surface of the water – how will it jump to catch it? Will it aim abo
Viktor [21]

Answer:

It will have aim at a point "below" the insect.

From the insect's point of view, the fish will appear to be shallower than it actually is because a ray of light from the insect to the fish will be bent "towards" the normal when the ray enters the water

5 0
2 years ago
if a bus has a mass of 5000 kg and a velocity of 10 m/s, what must the velocity of a 1500 kg can be to have the same momentum
fgiga [73]

Answer:

qeyygrydfguygffsddtggfxccfufdrfff

6 0
3 years ago
24. While measuring the length of a book, the reading of the scale at one end is 5.0 cm and at the other end is 20.5
il63 [147K]

Answer:

...do

Explanation:

24. While measuring the length of a book, the reading of the scale at one end is 5.0 cm and at the other end is 20.5

cm. What is the length of the book in mm?

25. Explain the modifications

3 0
3 years ago
A car and a motorcycle start from rest at the same time on a straight track, but the motorcycle is 25.0 m behind the car. The ca
sergeinik [125]

Answer:

t = 8.45 sec

car distance d = 132.09  m

bike distance d = 157.08 m

Explanation:

GIVEN :

motorcycle is 25 m behind the car , therefore distance need to covered by bike to overtake car is 25+ d, when car reache distance d at time t

for car

by equation of motion

d  = ut + \frac{1}{2}at^2

u = 0 starting from rest

d = \frac{1}{2}at^2

t^2 = \frac{2d}{a}

for bike

d+25 = 0 + \frac{1}{2}*4.40t^2

t^2= \frac{d+25}{2.20}

equating time of both

\frac{2d}{a} = \frac{d+25}{2.20}

solving for d we get

d = 132 m

therefore t is= \sqrt{\frac{2d}{a}}

t =  \sqrt{\frac{2*132}{3.70}}

t = 8.45 sec

each travelled in time 8.45 sec as

for car

d = \frac{1}{2}*3.70 *8.45^2

d = 132.09  m

fro bike

d = \frac{1}{2}*4.40 *8.45^2

d = 157.08 m

7 0
2 years ago
In a clock, the average speed is maximum for the tip of&lt;br /&gt;a) Seconds hand b) Hours hand c) Minutes hand​
Simora [160]
A, hope this helped! I didn’t really get it but I think it’s correct?
3 0
3 years ago
Read 2 more answers
Other questions:
  • Problem:
    12·1 answer
  • An average person can reach a maximum height of about 60 cm when jumping straight up from a crouched position. During the jump i
    7·1 answer
  • Which is a nonrenewable resource for the production of nuclear energy?
    7·2 answers
  • (a) How much gravitational potential energy (relative to the ground on which it is built) is stored in the Great Pyramid of Cheo
    12·1 answer
  • Ben and Jerry, arch rivals, decide to have a weight lifting contest during PE. Ready, set, go! Ben and Jerry both lift a 250 kg
    6·2 answers
  • If you calculate the thermal power radiated by typical objects at room temperature, you will find surprisingly large values, sev
    8·1 answer
  • A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevat
    10·1 answer
  • A wire long and with mass is positioned horizontally near the earth's surface and perpendicular to a horizontal magnetic field o
    10·1 answer
  • Can anyone help me with these questions? TIA!<br> (Don’t actually answer please! :) )
    13·1 answer
  • A kangaroo can jump straight up to a height of 2.0 m. What is its takeoff speed
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!