Which one of these statements is correct?

1.   ?    Forces are measured in Newtons but have no direction.
2.   ?    Forces are measured in kilograms but have no direction.
3.   ?    Forces are measured in kilograms and have a direction.
4.   ?    Forces are measured in Newtons and have a direction.

Which one of these statements is true?

1.   ?    Forces always add up regardless of their direction.
2.   ?    Forces always subtract, regardless of their direction.
3.   ?    Forces in the same direction add up, but subtract if they are in opposite directions.
4.   ?    Forces in the same direction subtract, but add up if they are in opposite directions.

Which of these happens when forces on a stationary object are unbalanced?

1.   ?    The object accelerates in the direction of the bigger force.
2.   ?    The object acclerated in the direction of the smaller force.
3.   ?    The object remains stationary, exerting a larger force on the resultant.
4.   ?    The object moves at right angles to the resultant force.

What happens if balanced forces act on an object travelling at constant speed?

1.   ?    The object accelerates.
2.   ?    The object slows down.
3.   ?    The object carries travelling at constant speed.
4.   ?    The object has to be stationary for forces to be balanced.

A large cannon ball and a small ball bearing are dropped at exactly the same time from a tower 10 m tall. Which one statement is true?

1.   ?    The heavier cannon ball accelerates at a larger rate and reaches the ground first.
2.   ?    Both objects accelerate at the same rate and reach the ground at the same time.
3.   ?    The lighter ball bearing is smaller, therefore has less air resistance, so it hits the ground first.
4.   ?    It's a matter of chance which object hits the ground first.

Which one of these statements explains mass and weight?

1.   ?    Both are the same and measured in kilograms.
2.   ?    Both are the same and measured in newtons.
3.   ?    Weight is measured in kilograms while mass is measured in newtons.
4.   ?    Weight is a force measured in newtons, while mass is the amount of material in an object, measured in kilograms.

Force and acceleration are related by Force =:

1.   ?    accleration ÷ mass
2.   ?    mass ÷ acceleration
3.   ?    mass × acceleration
4.   ?    mass + acceleration

When a car driver has to stop really quickly, the distance taken consists of:

1.   ?    the thinking distance only
2.   ?    the thinking distance added to the braking distance.
3.   ?    the braking distance only.
4.   ?    the thinking distance subtracted from the braking distance.

Which one of the following is true about a driver who has taken alcohol or drugs?

1.   ?    He is much more alert so the thinking distance is less.
2.   ?    Alcohol makes the leg weak so less force is put on the brake pedal.
3.   ?    Alcohol is a depressant so his reactions are slowed down, making the thinking distance more.
4.   ?    Although the thinking distance is more, the braking distance is less because the driver is much more confident.

Which one of these is true of terminal speed?

1.   ?    The drag caused by the movement through the air balances the weight pulling down.
2.   ?    The drag caused by the movement through the air is more than the weight pulling down.
3.   ?    The drag caused by the movement through the air is less than the weight pulling down.
4.   ?    It is called terminal speed because hitting the ground at this speed will cause fatal injuries.