A ball falls from rest through the air towards the ground. The diagram shows two forces acting on the ball. air resistance gravitational force As the ball falls, the air resistance increases. Which statement is correct? A The acceleration of the ball decreases. B The acceleration of the ball increases. C The speed of the ball decreases. D The gravitational force on the ball decreases. A O В C DO
A ball falls from rest through the air towards the ground. The diagram shows two forces acting on the ball. air resistance gravitational force As the ball falls, the air resistance increases. Which statement is correct? A The acceleration of the ball decreases. B The acceleration of the ball increases. C The speed of the ball decreases. D The gravitational force on the ball decreases. A O В C DO
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![A ball falls from rest through the air towards the ground. The diagram shows two forces acting on
the ball.
air resistance
gravitational force
As the ball falls, the air resistance increases.
Which statement is correct?
A
The acceleration of the ball decreases,
B
The acceleration of the ball increases.
The speed of the ball decreases.
D The gravitational force on the ball decreases.
A
В
C
D
نقطة واحدة
A bullet of mass 0.10kg travels horizontally at a speed of 600 m/s. It strikes a stationary wooden
block of mass 1.90 kg resting on a frictionless, horízontal surface.
The bullet stays in the block.
What is the speed of the bullet and the block immediately after the impact?
A 30m/s
B 32m/s
C 60m/s
D 134m/s
A
В](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe0f95b63-31c3-4ba5-ba58-d7094d8e0c9d%2Fb7d280eb-69ab-4875-9e68-7ab6a56590e8%2Fqx95z17_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A ball falls from rest through the air towards the ground. The diagram shows two forces acting on
the ball.
air resistance
gravitational force
As the ball falls, the air resistance increases.
Which statement is correct?
A
The acceleration of the ball decreases,
B
The acceleration of the ball increases.
The speed of the ball decreases.
D The gravitational force on the ball decreases.
A
В
C
D
نقطة واحدة
A bullet of mass 0.10kg travels horizontally at a speed of 600 m/s. It strikes a stationary wooden
block of mass 1.90 kg resting on a frictionless, horízontal surface.
The bullet stays in the block.
What is the speed of the bullet and the block immediately after the impact?
A 30m/s
B 32m/s
C 60m/s
D 134m/s
A
В
![A ball of mass 2.0kg is travelling at a speed of 12m/s. It moves towards an object of mass 3.0kg
which is at rest.
12m/s
3.0kg
at rest
2.0kg
The ball hits the object and sticks to it.
Which row gives the total momentum, and the speed of both objects immediately after the
collision?
total momentum
kgm/s
speed
m/s
4.8
B
8.0
24
4.8
24
8.0
A O
B O
c O
D O
نقطة واحدة
The diagram shows the energy used by a modern lamp.
60W input of
electrical power
48 W of power
wasted in heating
surroundings
12W of
useful power
output as light
Which expression gives the efficiency of the lamp?
12
12
x 100%
48
48
x 100% D
60
48
x 100% B
x 100%
12
A
60
A O
BO A](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe0f95b63-31c3-4ba5-ba58-d7094d8e0c9d%2Fb7d280eb-69ab-4875-9e68-7ab6a56590e8%2F3lee2pt_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A ball of mass 2.0kg is travelling at a speed of 12m/s. It moves towards an object of mass 3.0kg
which is at rest.
12m/s
3.0kg
at rest
2.0kg
The ball hits the object and sticks to it.
Which row gives the total momentum, and the speed of both objects immediately after the
collision?
total momentum
kgm/s
speed
m/s
4.8
B
8.0
24
4.8
24
8.0
A O
B O
c O
D O
نقطة واحدة
The diagram shows the energy used by a modern lamp.
60W input of
electrical power
48 W of power
wasted in heating
surroundings
12W of
useful power
output as light
Which expression gives the efficiency of the lamp?
12
12
x 100%
48
48
x 100% D
60
48
x 100% B
x 100%
12
A
60
A O
BO A
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