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
skad [1K]
3 years ago
9

A ball is released at the top of a ramp at t =0. which is the speed of the ball at t=4

Physics
2 answers:
Semmy [17]3 years ago
6 0
Accel;eration due to gravity= 9.8m/s^2. Initial velocity = 0(given). Time=4. Applying kinematic equation v=u+at, v= 0 + 9.8x4 = 39.2. Therefore speed of the ball after t=4 is 39.2
vodka [1.7K]3 years ago
3 0
AbhiGhost your answer would be right if we were talking about free fall. The force that is providing the acceleration is Fx=mgsinФ, where Ф is the angle the ramp makes with the horizontal.
Fx=ma=mgsinФ
Hence:
a=gsinФ.
And the speed is v=a*t=gsinФ*t.
You might be interested in
which of the following is an example of a compound machine. a. a bicycle chain. b. a coffee mug. c. a paper cutter
Ann [662]
A. a bicycle chain is an example of a compound machine
8 0
3 years ago
How much Tim in minutes will it take a car driving at 90km/hr to travel 27 kilometers
astraxan [27]

Answer:

18min

Explanation:

v=d/t

t=d/v= 27/90 =0.3hrs =18min

6 0
3 years ago
Which of the following equations describes Newton’s second law
svp [43]
C.

Newton’s Second Law is F=ma (force is equal to the mass multiplied by acceleration), however, the equation can be rearranged to isolate and calculate mass from force over acceleration. Therefore, m=F/a
8 0
3 years ago
Read 2 more answers
On a spinning ride at the fair, it is inertia that keeps you moving in a circle. true or false​
lions [1.4K]

False, the inertia does not keep us moving in a circle on a spinning ride at the fair.

Answer: Option B

<u>Explanation: </u>

Inertia is the resisting force of any object which resists in change in their state. If an object is moving the inertia will act in opposing direction to the force acting on the object stopping its motion.

Similarly, if an object resembles at rest, then the inertia will be acting against the force tending to move that stationary object. So, on a spinning ride at fair, when a person sits there, the inertia acting on the person will prevent the person to falling down from the fair and not in moving in a circle.

6 0
3 years ago
Help ASAP.
Temka [501]

Answer:

Depending on where people are located in the world (Northern hemisphere, Southern hemisphere, etc) depends on the difference in direction (North, South, east, West) which is most likely why it'd look different.

Explanation:

I dunno if this is along the lines of an answer you're looking for, but hope this helps :)

7 0
3 years ago
Other questions:
  • If you want to lift a 5-kg box to a height of 2 meters, how much work must be
    5·2 answers
  • objects A and B are brought close to each other. object A will soon become positively charged. identify the charge that must tra
    5·2 answers
  • A cup of coffee sits on the dashboard of an automobile. Even though you hold the cup still, as the car goes around a sharp curve
    9·2 answers
  • What is the acceleration of a 0.30-kg volleyball when a player uses a force of 42 N to spike the ball?
    10·1 answer
  • Suppose that the sound level of a conversation is initially at an angry 71 dB and then drops to a soothing 54 dB. Assuming that
    7·1 answer
  • Which describes the relationship between the frequency wavelength, and speed of a wave as the wave travels through
    9·1 answer
  • Nguồn phát của tia X
    12·1 answer
  • Can Hockey players hold the puck with their open hand?
    5·1 answer
  • Will a 5g piece of platinum sink or float in water
    13·1 answer
  • Erik Erikson’s theory of psychosocial development emphasizes that development occurs by overcoming an emotional crisis in each o
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!