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WorksheetsH Physics - Unit 3 ODU Complete
Total questions: 54
Worksheet time: 1hrs 8mins
A boat is moving at a speed of 6·0 m s−1.
The boat now accelerates at 3·0 m s−2 until it reaches a speed of 12 m s−1.
The distance travelled by the boat during this acceleration is (a)
A ball moves down a frictionless slope from X to Y.
Which graph shows how the acceleration a of the ball varies with time t as it moves down the slope?
An object starts from rest and accelerates in a straight line.
The graph shows how the acceleration of the object varies with time.
The speed of the object at 5 seconds is (a)
A train accelerates uniformly from 5·0 m s−1 to 12·0 m s−1 while travelling a distance of 119 m along a straight track.
The acceleration of the train is (a)
A trolley travels along a straight track. The graph shows how the velocity v of the trolley varies with time t.
Which graph shows how the acceleration a of the trolley varies with time t?
A vehicle is travelling in a straight line.
Graphs of velocity and acceleration against time are shown.
Which pair of graphs could represent the motion of the vehicle?
The following velocity-time graph represents the vertical motion of a ball.
Which of the following acceleration-time graphs represents the same motion?
An object has a constant acceleration of 3 m s-2.
This means that
distance travelled by the object increases by 3 metres every second
displacement of the object increases by 3 metres every second
speed of the object is 3 m s-1 every second
velocity of the object is 3 m s-1 every second
velocity of the object increases by 3 m s-1 every second.
The graph shows how the speed v of a car varies with time t.
The average speed of the car during the 12·0 s is
1.25 m s-1
2.08 m s-1
2.50 m s-1
7.50 m s-1
12.5 m s-1
A ball is dropped from rest and allowed to bounce several times.
The graph shows how the velocity of the ball varies with time.
A student makes the following statements about the ball.
I The ball hits the ground at P.
II The ball is moving upwards between Q and R.
III The ball is moving upwards between R and S.
Which of these statements is/are correct? (a)
Which of the following contains two vector quantities and one scalar quantity?
acceleration, mass and momentum
time, distance and force
velocity, force and momentum
displacement, velocity and acceleration
speed, distance and momentum
A rock of mass 0·80 kg falls towards the surface of a planet.
The graph shows how the gravitational field strength, g, of the planet varies with height, h, above the surface of the planet.
At one point during its fall the weight of the rock is 4·0 N.
The height of this point above the surface of the planet is (a)
A rocket of mass 200 kg accelerates vertically upwards from the surface of a planet at 2·0 m s –2.
The gravitational field strength on the planet is 4·0 N kg–1.
What is the size of the force being exerted by the rocket’s engines?
400 N
800 N
1200 N
2000 N
2400 N
A car of mass 1200 kg pulls a horsebox of mass 700 kg along a straight, horizontal road. They have an acceleration of 2·0 m s–2.
Assuming that the frictional forces are negligible, the tension in the coupling between the car and the horsebox is
500 N
700 N
1400 N
2400 N
3800 N
A car of mass 1000 kg is travelling at a speed of 40 m s–1 along a race track. The brakes are applied and the speed of the car decreases to 10 m s–1.
How much kinetic energy is lost by the car?
15 kJ
50 kJ
450 kJ
750 kJ
800 kJ
A skydiver of total mass 85 kg is falling vertically.
At one point during the fall, the air resistance on the skydiver is 135 N.
The acceleration of the skydiver at this point is
0.6 m s–2
1.6 m s–2
6.2 m s–2
8.2 m s–2
13.8 m s–2
A box of weight 120 N is placed on a smooth horizontal surface.
A force of 20 N is applied to the box as shown.
The box is pulled a distance of 50 m along the surface.
The work done in pulling the box is
500 J
866 J
1000 J
6000 J
6866 J
The diagram shows the resultant of two vectors.
Which of the diagrams below shows the vectors which could produce the above resultant?
A block of wood slides with a constant velocity down a slope.
The slope makes an angle of 30º with the horizontal as shown.
The mass of the block is 2·0 kg.
The magnitude of the force of friction acting on the block is (a)
A person stands on bathroom scales in a lift. The scales show a reading greater than the person’s weight.The lift is moving (a)
A boat is moving at a speed of 6·0 m s−1.
The boat now accelerates at 3·0 m s−2 until it reaches a speed of 12 m s−1.
The distance travelled by the boat during this acceleration is (a)
The graph shows how the force acting on an object of mass 5·0 kg varies with time.
The change in momentum of the object is (a)
A cannon of mass 2·0 × 103 kg fires a cannonball of mass 5·00 kg.
The cannonball leaves the cannon with a speed of 50·0 m s−1.
The speed of the cannon immediately after firing is (a)
A car of mass 1000 kg is travelling at a speed of 40 m s–1 along a race track. The brakes are applied and the speed of the car decreases to 10 m s–1.
How much kinetic energy is lost by the car?
15 kJ
50 kJ
450 kJ
750 kJ
800 kJ
0.4 m s-1
1.2 m s-1
2.0 m s-1
2.2 m s-1
3.0 m s-1
A shell of mass 5. 0 kg is travelling horizontally with a speed of 200 m s−1.
It explodes into two parts.
One part of mass 3. 0 kg continues in the original direction with a speed of 100 m s−1.
The other part also continues in this same direction.
Its speed is (a)
The graph shows the force which acts on an object over a time interval of 8 seconds.
The momentum gained by the object during this 8 seconds is (a)
A cannon of mass 2000 kg fires a cannonball of mass 5.00 kg.
The cannonball leaves the cannon with a speed of 50 m s-1.
The speed of the cannon immediately after firing is (a)
A student makes the following statements about an elastic collision.
I Total momentum is conserved.
II Total kinetic energy is conserved.
III Total energy is conserved.
Which of these statements is/are correct?
I only
II only
I and II only
I and III only
I, II and III
A golfer hits a ball of mass 5.0 x 10-2 kg with a golf club.
The ball leaves the tee with a velocity of 80 m s-1.
The club is in contact with the ball for a time of 0.10 s.
The average force exerted by the club on the ball is (a)
An arrow is fired with a velocity of 27 m s−1 at 25° above the horizontal. (© BBC Bitesize)
It lands on level ground.
Calculate the vertical component of initial velocity.
11.4 m s-1
24.5 m s-1
27.0 m s-1
An arrow is fired with a velocity of 27 m s−1 at 25° above the horizontal. (© BBC Bitesize)
It lands on level ground.
Calculate the horizontal component of initial velocity.
11.4 m s-1
24.5 m s-1
27.0 m s-1
A planet orbits a star at a distance of 3·0 × 109 m.
The star exerts a gravitational force of 1·6 × 1027 N on the planet.
The mass of the star is 6·0 × 1030 kg.
G = 6·67 × 10−11 m3 kg−1 s−2
The mass of the planet is (a)
Enceladus is a moon of Saturn.
The mass of Enceladus is 1·08 × 1020 kg.
The mass of Saturn is 5·68 × 1026 kg.
The gravitational force of attraction between Enceladus and Saturn is 7·24 × 1019N.
The orbital radius of Enceladus around Saturn is (a)
A javelin is thrown at an angle of 60·0° to the horizontal with a speed of 20·0 m s−1
The javelin is in flight for 3·50 s.
The effects of air resistance can be ignored.
The horizontal distance travelled by the javelin is (a)
Two small asteroids are 12 m apart.
The masses of the asteroids are 2·0 × 103 kg and 0·050 × 103 kg.
The gravitational force acting between the asteroids is (a)
A
B
C
D
E
The distance between a spacecraft and a space station is 0·45 km.
The mass of the spacecraft is 1·08 × 105 kg.
The mass of the space station is 3·44 × 105 kg.
The gravitational force between the spacecraft and the space station is (a)
A spacecraft is travelling at a constant speed of 0∙60c relative to the Moon.
An observer on the Moon measures the length of the moving spacecraft to be 190 m.
The length of the spacecraft as measured by an astronaut on the spacecraft is (a)
A spacecraft is travelling at a constant speed of 2·75 × 108 m s-1 relative to a planet.
A technician on the spacecraft measures the length of the spacecraft as 125 m.
An observer on the planet measures the length of the spacecraft as (a)
A spacecraft is travelling at 0·10c relative to a star.
An observer on the spacecraft measures the speed of light emitted by the star to be (a)
A spacecraft is travelling at a speed of 0·200c relative to the Earth.
The spacecraft emits a signal for 20·0 seconds as measured in the frame of reference of the spacecraft.
An observer on Earth measures the duration of the signal as (a)
A spaceship on a launch pad is measured to have a length L.
This spaceship has a speed of 2∙5 × 108 m s−1 as it passes a planet.
Which row in the table describes the length of the spaceship as measured by the pilot in the spaceship and an observer on the planet?
A
B
C
D
E
A spacecraft is travelling at a constant speed relative to a nearby planet.
A technician on the spacecraft measures the length of the spacecraft as 275 m.
An observer on the planet measures the length of the spacecraft as 125 m.
The speed of the spacecraft relative to the observer on the nearby planet is (a)
A siren on an ambulance emits sound at a constant frequency of 750 Hz.
The ambulance is travelling at a constant speed of 25∙0 m s−1 towards a stationary observer.
The speed of sound in air is 340 m s−1.
The frequency of the sound heard by the observer is (a)
A student makes the following statements about the Universe.
I The force due to gravity acts against the expansion of the Universe.
II Measurements show the rate of expansion of the Universe is increasing.
III The mass of a galaxy can be estimated by the orbital speed of the stars within the galaxy.
Which of these statements is/are correct?
I only
II only
III only
I and II only
I, II and III
A car horn emits a sound with a constant frequency of 405 Hz.
The car is travelling away from a student at 28·0 m s−1.
The speed of sound in air is 335 m s−1.
The frequency of the sound from the horn heard by the student is (a)
The redshift of a distant galaxy is 0·014.
According to Hubble’s law, the distance of the galaxy from Earth is (a)
The siren on an ambulance is emitting sound with a constant frequency of 900 Hz. The ambulance is travelling at a constant speed of 25 m s−1 as it approaches and passes a stationary observer. The speed of sound in air is 340 m s−1.
Which row in the table shows the frequency of the sound heard by the observer as the ambulance approaches and as it moves away from the observer?
A
B
C
D
E
Cosmic microwave background radiation and Olbers’ paradox provide evidence for
the photoelectric effect
the Bohr model of the atom
the theory of special relativity
the Big Bang theory
Newton’s Law of Universal Gravitation
A galaxy has a recessional velocity of 0·30c.
Hubble’s Law predicts that the distance between Earth and this galaxy is (a)
Measurements of the expansion rate of the Universe lead to the conclusion that the rate of expansion is increasing.
Present theory proposes that this is due to
redshift
dark matter
dark energy
the gravitational force
cosmic microwave background radiation
A student makes the following statements about the radiation emitted by stellar objects.
I Stellar objects emit radiation over a wide range of frequencies.
II The peak wavelength of radiation is longer for hotter objects than for cooler objects.
III At all frequencies, hotter objects emit more radiation per unit surface area per unit time than cooler objects.
Which of these statements is/are correct?
I only
III only
I and II only
I and III only
I, II and III
The graphs show how the radiation per unit surface area, R, varies with the wavelength, λ, of the emitted radiation for two stars, P and Q.
A student makes the following conclusions based on the information in the graph.
I Star P is hotter than star Q.
II Star P emits more radiation per unit surface area than star Q.
III The peak intensity of the radiation from star Q is at a shorter wavelength than that from star P.
Which of these statements is/are correct?
I only
II only
III only
I and II only
II and III only
