Types of force

9.A car is driving along a road. The forwards force is greater than the backwards force. What happens to the car's speed?

10.Which of the following is a contact force that acts at 90° to a surface?

11.Which force can be either attractive or repulsive?

12.A rope being pulled experiences which force?

13.A student pushes a book across a table. Which force is responsible for opposing the motion of the book?

14.The weight of an object on Earth is 50 N. If the object is taken to the Moon where gravitational field strength is 1/6 of Earth's, what is its weight on the Moon?

15.A boat floats on water because of which force?

16.Which of the following is a contact force?

17.A skydiver of mass 70 kg is falling at terminal velocity. What is the magnitude of the upward force acting on them? (Take g = 10 N/kg)

18.The graph shows the speed of a car over time. During which interval are the forces on the car balanced?

19.Which force is always directed towards the centre of the Earth?

20.A rocket accelerates upwards. Which force is responsible for its forward motion?

21.Two magnets are brought close together. The force between them is 5 N when they are 2 cm apart. If the distance is doubled, what happens to the force?

22.A book rests on a table. The upward force from the table on the book is called:

23.A student pulls a rope with a force of 100 N. The rope is attached to a wall. What is the tension in the rope?

24.Which type of force can be either attractive or repulsive?

25.A student measures the force needed to pull a wooden block across a surface. They repeat the experiment with sandpaper glued to the block. Which force is being investigated?

26.A student uses a spring balance to measure the weight of a 500 g mass. The spring balance shows 5.0 N. The student then repeats the measurement on the Moon where gravitational field strength is 1.6 N/kg. What will the spring balance read?

27.A student places a book on a table. The book does not move. Which two forces are balanced?

28.A skydiver is falling at terminal velocity. Which statement about the forces is correct?

29.A student investigates the effect of surface area on air resistance by dropping paper cones of different sizes. Which variable should be kept constant?

30.A student pulls a rope with a force of 50 N. The rope is attached to a wall. What is the tension in the rope?

31.A car accelerates forward. Which force is responsible for its forward motion?

32.A student places a magnet near a paperclip. The paperclip moves towards the magnet. Which type of force is acting?

33.Which of the following forces is a contact force that acts against the direction of motion?

34.Which force is an upwards contact force that allows objects to float?

35.A car accelerates forward. The forwards force is 2000 N and the backwards force is 1500 N. What is the resultant force on the car?

36.A student investigates the force needed to pull a wooden block across different surfaces. They use a newton meter to pull the block at a steady speed. Which force are they measuring?

37.A student drops a ball and measures its speed at different times. The results show that the ball initially accelerates, then moves at constant speed. Which force is equal to the weight of the ball when it moves at constant speed?

38.Which of the following forces is always directed towards the centre of the Earth?

39.A student uses a spring balance to measure the weight of a 500 g mass. The spring balance shows 5.0 N. The student then repeats the measurement on the Moon where gravitational field strength is 1/6 of Earth's. What reading would the spring balance show on the Moon?

40.Which force allows a boat to float on water?

41.Friction is a non-contact force.

42.Weight is a contact force.

43.Thrust is the force that allows objects to float.

44.Air resistance acts against the direction of motion.

45.Which of the following forces is a contact force?

46.Match each force description to the correct force name.

47.Arrange the following forces in the order: contact forces first, then non-contact forces.

48.Match each description to the correct force name.

49.Which of the following are contact forces? (Select all that apply.)

50.Arrange the following forces in order from the one that always acts downwards to the one that acts upwards.

51.Complete the sentence.

52.State two examples of a contact force.

53.State two examples of a non-contact force.

54.Complete the sentence using the words in the box. (Words: contact, non-contact, attractive, repulsive)

55.Describe what it means to say that two forces are balanced.

56.A car engine provides a forwards thrust of 3000 N. The total backwards forces (friction and air resistance) are 2000 N. What is the resultant force on the car?

57.A car engine provides a forwards thrust of 3000 N. The total backwards forces (friction and air resistance) are 2000 N. What is the resultant force on the car?