Question

A 1,500 kg car starts from rest and accelerates to 23 m/s in 11 s. Assume that the air resistance remains constant at 162 N.

- Calculate the acceleration of the car.
- Calculate the average force exerted by engine during this time.
- Calculate the average velocity of the car.
- Calculate the average power output during this time.

Answer #1

A 1.50 ✕ 103-kg car starts from rest and accelerates
uniformly to 16.0 m/s in 12.9 s. Assume that air resistance remains
constant at 400 N during this time.
(a) Find the average power developed by the engine.
____ hp
(b) Find the instantaneous power output of the engine at t
= 12.9 s, just before the car stops accelerating.
______ hp

A 1.50 ✕ 103-kg car starts from rest and accelerates
uniformly to 15.1 m/s in 12.7 s. Assume that air resistance remains
constant at 400 N during this time.
(a) Find the average power developed by the engine. (hp)
(b) Find the instantaneous power output of the engine at t
= 12.7 s, just before the car stops accelerating. (hp)

a 2500 kg car accelerates uniformly from rest to 15.0 m/s in
8.00 s.
What is the work done on the car in this time interval?
What is the power delivered by the engine in this time
interval?
Answer in 3 decimal places, and include full equation please

a car starts from rest and accelerates uniformly, until it has
traveled 15km and acquired a velocity of 30m/s. the car then moves
at this constant velocity of 30 m/s for 15 minutes. the driver then
applied the brakes and the car stopped after 5 minutes.
find
the acceleration during the last part of the trip: a1=
The acceleration during the last part of the trip: a3=
The total distance traveled during the whole trip: dtot=

A radio controlled model car with mass m=2.98 kg starts a race
initially from rest at t=0 and accelerates with constant
acceleration to a speed of 14.4 m/s in a time of t=10.0 s. What is
the average power do the car's batteries have to deliver during the
acceleration, and what is the instantaneous power at the end of the
time interval? Select one answer for average power (P-ave) and one
for the instantaneous power at t=10.0 s (P-final).
P-ave=31...

Suppose that a car starts from rest its engine providing an
acceleration of 10gt/s while air resistance provides 0.1 ft/s^2 of
deceleration for each foot per second of the cars velocity
Find
b) Find how long it takes the car to attain 90% of its limiting
velocity and how far it travels while doing so

A 2000 kg car starts from rest. After 2 seconds, the car is
moving at a velocity of 9 m/s. There is a retarding friction force
of 600N acting on the car. What is the power needed by the car in
order to accelerate from rest to that final velocity?

A 40%-efficient car engine accelerates the 2000 kg car from rest
to 19 m/s . How much energy is transferred to the engine by burning
gasoline?

A car starts from rest and accelerates (at a constant rate) to a
speed of 76.8 km/h in 8.63 s. The car continues travelling at 76.8
km/h. What is the average speed of the car at 19.22 s, ie. over all
the time it has been moving? Give your answer in km/h.

The wheels on a car have a radius of 0.250 m. The car starts
from rest and the driver accelerates the car at a constant rate and
reaches a speed of 47.0 miles per hour in 7.0 s. a) Calculate the
angular acceleration of the wheels of the car. b) The driver
applies the brakes for 5.0 s which decelerates the car at a rate of
15.0 rad/s2. Calculate the total distance the car traveled during
the entire 12.0 s...

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