(c) curved track. direction of motion Fig. 1.2 State the effect that this force has on the motion... (iii) ... State how this force is provided. ...

Transcription

1 2 (c) As the train is driven round the bend, there is an extra force acting, called the centripetal force. (i) On Fig. 1.2, draw an arrow to show the direction of this force. train curved track direction of motion (ii) Fig. 1.2 State the effect that this force has on the motion. (iii) State how this force is provided. 2 [3] [Total: 8] A scientist needs to find the density of a sample of rock whilst down a mine. He has only a spring balance, a measuring cylinder, some water and some thread. (a) In the space below, draw two labelled diagrams, one to show the spring balance being used and the other to show the measuring cylinder being used with a suitable rock sample. [2]

2 UNIQUE SCIENCE ACADEMY Test (Unit 1-3) Name :... Paper: Physics Date :... Class: C1 Time Allowed: 35Minutes Maximum Marks: 25 [Total 16 Marks] 1 Fig. 1.1 shows the motion of a train over a section of track which includes a sharp bend Theory Section: m/s (a) time/s Fig. 1.1 The section of the track with the sharp bend has a maximum restriction. The train decelerates approaching the bend so that at the start of the bend it has just reached the maximum allowed. The train is driven around the bend at the maximum allowed and accelerates immediately on leaving the bend. (i) What is the maximum allowed round the bend in the track? (ii) How long does the train take to travel the bend of the track? maximum =... (iii) Calculate the length of the bend. time taken =... (b) length of bend =... [3] The train has to slow down to go round the bend. Calculate the deceleration. deceleration =...[2]

3 3 (b) The spring balance is calibrated in newtons. State how the mass of the rock sample may be found from the reading of the spring balance....[1] (c) State the readings that would be taken from the measuring cylinder [1] (d) State how the volume of the rock would be found from the readings....[1] (e) State in words the formula that would be used to find the density of the sample. density = [1] (f) Define the terms velocity and acceleration of a body in straight line [2] [Total: 8] MCQ SECTION: [Total 9 Marks] What must change when a body is accelerating? A B C D the force acting on the body the mass of the body the of the body the velocity of the body

4 4 2 3 In a laboratory on Earth, balances show that an object has a mass of 2 kg and a weight of 20 N. The same balances and object are then taken to the Moon, where the gravitational field strength is less than on the Earth. Are the mass and weight of the object the same, or less, than before? mass weight A less less B less same C same less D same same The diagram shows a micrometer scale. mm Which reading is shown? A 5.64 mm B 7.14 mm C 7.16 mm D 7.64 mm 4 The diagrams show the times on a stopclock at the beginning and at the end of an experiment. stopclock at beginning 0 s stopclock at end 0 s How long did the experiment take? A 10 s B 25 s C 35 s D 45 s

5 5 5 Which / time graph applies to an object at rest? A B C D time 0 time 0 time 0 time 6 A spring is stretched by hanging a piece of metal from it. spring metal What is the name given to the force that stretches the spring? A friction C pressure 7 B mass D weight A racing car is fitted with an on-board computer. Every time the car passes the starting line, the computer records the travelled in the next 2 seconds. Which set of data shows that the car is increasing in during the 2 seconds? A B C D

6 8 Three horizontal forces act on a car that is moving along a straight, level road. air resistance 6 friction driving force Which combination of forces would result in the car moving at constant? air resistance friction driving force A 200 N 1000 N 800 N B 800 N 1000 N 200 N C 800 N 200 N 1000 N D 1000 N 200 N 800 N 9 What are the correct units for force and for weight? force weight A kg kg B kg N C N kg D N N MCQ Answer Sheet 1 A B C D 6 A B C D 2 A B C D 7 A B C D 3 A B C D 8 A B C D 4 A B C D 9 A B C D 5 A B C D