Question

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?

Answer #1

A race car starts from rest and travels east along a straight
and level track. First part of the motion the car’s velocity is
given by 13 m/s after which it starts to accelerate. What is the
acceleration of the car if it reaches to a velocity of 46.12 m/s
after 19 s.

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.

A 3.00 kg block starts from rest at the top of a 30° incline and
accelerates uniformly down the incline, moving 1.83 m in 1.80
s.
(a) Find the magnitude of the acceleration of the block.
m/s2
(b) Find the coefficient of kinetic friction between the block
and the incline.
(c) Find the magnitude of the frictional force acting on the
block. N
(d) Find the speed of the block after it has slid a distance
1.83 m. m/s

1 point) A truck starts from rest and accelerates at
1?/?2. 6 s later, a car accelerates from rest at the
same starting point with an acceleration of
2.7?/?2.
a) Where and when does the car catch the truck?
1. ?m from the starting point
2. at ? seconds from the moment the truck started to
accelerate.
b) What are their velocities when they meet?
The truck : m/s
The car : m/s

A 2.70-kg block starts from rest at the top of a 30.0° incline
and slides a distance of 1.90 m down the incline in 1.20 s.
(a) Find the magnitude of the acceleration of the block.
(m/s)^2
(b) Find the coefficient of kinetic friction between block and
plane.
(c) Find the friction force acting on the block.
Magnitude N
Direction
(d) Find the speed of the block after it has slid 1.90 m.
(m/s^2)

A crate with a mass of 3.00 kg starts from rest at the top of a
28.0° incline and slides 2.00 m down the incline in 1.25 s.
(a) What is the magnitude of the acceleration of the crate (in
m/s2)?
2.56 m/s2 correct
b) What is the frictional force (in N) acting on the crate?
(Enter the magnitude.)
(c) What is the coefficient of kinetic friction between the
crate and the incline?
(d) What is the speed of the...

a
car accelerates uniformly from rest to 24.1 m/s in 9 s along a
level stretch of road. Ignoring friction , determine the average
power required to accelerate the car if the mass of the car is
1,131 kg

A 1000-kg car moving north with a speed of 25.0 m/s collides
with a 2000- kg truck moving at an angle of 30° north of west with
a speed of 20.0 mjs. After the collision, the car and the truck
stuck together. What is the magnitude of their common velocity
after the collision?

1) A car with a mass of 2000 kg with an initial
velocity of 10 m/s crashes into a wall. The time variation (Delta
t) is 0.015 seconds. What is the change in momentum? What is the
car's impulse and force? What if the car crashes into a haystack
with a time variation (Delta t) of 0.15 seconds. What would then be
its change in momentum, impulse and force. How about its final
velocity?
2) A swing made of a...

A car starts from rest and accelerates at a constant rate
traveling a distance of 200 m in t s. The car continues to
accelerate at the same rate for an additional 135 m. If the speed
of the car after it has travelled the (200+135) m is 70 m/s, how
long t (in s) did the car accelerate for?

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