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
Nuetrik [128]
3 years ago
12

A powerboat, starting from rest maintains a constant acceleration. After a certain time Δt, its displacement and velocity are Δr

and Δv. At time 2Δt, what will be its displacement and velocity, assuming the acceleration remains constant?
(A) 2Δr and 2Δv
(B) 2Δr and 4Δv
(C) 4Δr and 2Δv
(D) 4Δr and 4Δv
Physics
1 answer:
Mazyrski [523]3 years ago
6 0

Answer:

The correct option is C) 4Δr and 2Δv

Explanation:

Initially from rest means , initial velocity and displacement is zero.

AT time t = Δt ,

Displacement ( s ) = Δr

velocity ( v) = Δv

Now At t = 2Δt

By using the equation of motion

v = u + at

s = ut + ( 1/2)at²

Here ,

v ∝ t   and s ∝ t²

Increasing times by two time velocity will increase twice and displacement by four times

Displacement = 4Δr

Velocity = 2Δv

You might be interested in
When this circuit is closed, which way do the electrons flow?
gizmo_the_mogwai [7]

Answer:

from the positive end of the battery through the capacitor through the resistors to the negative end...

Current flows from higher potential (+) to lower potential (-)..

3 0
3 years ago
Read 2 more answers
A high school has started a community service program. Under the program, students must participate in volunteer activities, suc
GrogVix [38]
I think the answer is reduction in tuition
3 0
3 years ago
Read 2 more answers
State whether the following statement are true or false .
Klio2033 [76]
1. It’s true
4 ,7 ,8 is correct
5 0
2 years ago
A girl playing tug-of-war with her dog pulls the dog a distance of 8.0m by exerting a force at an angle of 18° with the horizont
AnnZ [28]

Answer:

25 N

Explanation:

Work is a product of force and perpendicular distance moved.

W=Fd where F is force exerted and d is perpendicular distance.

However, for this case, the distance is inclined hence resolving it to perpendicular so that it be along x-axis we have distance as dcos\theta

Therefore, W=Fdcos\theta

Making F the subject of the formula then

F=\frac {W}{dcos\theta} where \theta is the angle of inclination. Substituting 190 J for W then 18 degrees for \theta and 8 m for d then

F=\frac {190}{8cos18^{\circ}}\approx 25N

3 0
2 years ago
What is the amount of charge when 13.5a is flowing for 2 1/2 hours
abruzzese [7]

Answer:

Quick Answer:

a.  8.9Ω

b.  1.2×104 C

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimu
    11·1 answer
  • __________ is the term for a reaction where energy is released.
    15·1 answer
  • If the brakes are applied and the speed of the car is reduced to 12 m/s in 15 s , determine the constant deceleration of the car
    13·1 answer
  • The process by which rods and cones become less sensitive to light is called ________.
    14·1 answer
  • Given two vectors A⃗ = 4.20 i^+ 7.00 j^ and B⃗ = 5.70 i^− 2.60 j^ , find the scalar product of the two vectors A⃗ and B⃗ .
    5·1 answer
  • Describe transmission
    11·1 answer
  • A baseball rolls off of a 0.70 m high desk at 0.66m/s.How far from the base of the desk will it hit the floor?
    5·1 answer
  • An object that has the ability to do work has __________ energy.
    7·2 answers
  • el of a Shs when places in water. The same piece of day ficas ftis made into the stage of a boat. Why does the day ficat when ma
    12·1 answer
  • Read the passage.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!