Revision Quiz Bowl Units and Measurement Speed, Velocity and Acceleration Interpreting Graphs Forces and Newton’s Laws Freefall

Round 1: True or False Write T for true or F for false Each correct answer is worth 1 point 5 seconds to write an answer All groups must raise their tag boards Groups with correct answers should wait for their scores to be tallied before erasing their answers

Question 1 If a car changes direction while moving at constant speed, then it is accelerating.

A body that is in free fall on Earth has constant acceleration. Question 2 A body that is in free fall on Earth has constant acceleration.

Mass changes with location. Question 3 Mass changes with location.

The greater is the mass of a body, the greater is its inertia. Question 4 The greater is the mass of a body, the greater is its inertia.

Question 5 The gradient of a speed-time graph is equal to the distance traveled by the object.

Velocity is a vector quantity. Question 6 Velocity is a vector quantity.

The base unit for mass is gram. Question 7 The base unit for mass is gram.

Question 8 If an object is moving at constant velocity, then the net force on it is zero.

Question 9 If the acceleration is opposite in direction to the velocity, then the object speeds up.

Air resistance on a body increases as its speed increases. Question 10 Air resistance on a body increases as its speed increases.

Round 2: Fill in the blank Complete the statement by filling in the correct missing word 10 seconds to write an answer Wrong spelling is wrong 3 points for every correct answer

_________ is the total distance divided by the total time taken. Question 1 _________ is the total distance divided by the total time taken.

The change in velocity per unit time is called __________. Question 2 The change in velocity per unit time is called __________.

_________ is the gravitational force on an object. Question 3 _________ is the gravitational force on an object.

_________ is a number and a unit. Question 4 _________ is a number and a unit.

Force divided by mass is _____________. Question 5 Force divided by mass is _____________.

The amount of matter in an object is otherwise known as ___________. Question 6 The amount of matter in an object is otherwise known as ___________.

A _________ quantity has magnitude but no direction. Question 7 A _________ quantity has magnitude but no direction.

For every action there is an equal and _____________ reaction. Question 8 For every action there is an equal and _____________ reaction.

____________ velocity. Question 9 When air resistance balances the gravitational force on a body, the body moves at constant speed called the ____________ velocity.

The base unit for length is __________. Question 10 The base unit for length is __________.

Round 3: Problem Solving Give the exact answer with correct units 15 seconds to write an answer 5 points for every correct answer

Question 1 For her P.E. class, a student completes the three laps of 1200 m in 2 min 30 s. Find her average speed in the first lap in ms-1.

Question 1 Answer 8 ms-1

Calculate the total distance traveled by the car. Question 2 Calculate the total distance traveled by the car.

Question 2 Answer 2072 m

Question 3 A bus moves from 3 ms-1 to a speed of 15 ms-1 in 12 s. Determine its average acceleration.

Question 3 Answer 1 ms-2

Question 4 A rocket of weight 1000 N is propelled upwards by a thrust of 1800 N. The air resistance is 500 N. What is the resultant force (magnitude and direction) on the rocket?

Question 4 Answer 300 N, upwards

Determine the unknown mass M in the given figure. Question 5 Determine the unknown mass M in the given figure.

Question 4 Answer 200 g

Question 6 A rocket has a mass of 500 kg. At lift-off, the rocket engine exerts an upward force of 25000 N. What is the acceleration of the rocket?

Question 6 Answer 4 ms-2

Calculate the speed of the car. Question 7 Calculate the speed of the car.

Question 7 Answer 20 ms-1

The End