force and motion test

what is the difference between speed and velocity?

• speed has magnitude and direction, velocity has magnitude only.

• speed has magnitude and direction, velocity has direction only.

• speed has magnitude only, velocity has magnitude and direction

• speed has magnitude only, velocity has direction only

a force of 10N is applied to a piston of area 0.10 m2, causing a pressure. this pressure is transmitted through a fluid to a piston of area 2.0m2. what is the force on this piston?

• 2.0 N

• 20 N

• 200 N

• 2000 N

A parachutist falls vertically at constant speed. which statement about the resultant force on the parachutist is correct?

• the resultant force on the parachutist acts vertically downwards

• the resultant force on the parachutist acts vertically upwards

• the resultant force on the parachutist is equal to his weight

• the resultant force on the parachutist is equal to zero

what was Usain Bolt's average speed when he achieved his 100m world record of 9.58 s in 2009?how do you know that his top speed must have been higher than this?

an object weighs 29 N on a planet where the acceleration of free fall is 3.8 m/s2. what is the mass of the object?

• 0.2 kg

• 1.9 kg

• 5 kg

• 72 kg

a snail takes part in a snail race. the snail completes the 180 cm course in 7 minutes. what is the approximate average speed of the snail?

• 0.43 m/s

• 26 m/s

• 0.26 m/s

• 0.0043 m/s

Match the following Please take into account the correct units and measuring instruments.

• ruler

• thickness

• vernier caliper

• length

• forcemeter

• mass

• a scale

• weight

• cylinder

• volume

what is the mass of a microscope slide that has dimensions of 75 mm x 26 mm x 1 mm and has a density of 2.24 g/cm3?

The Newton, N is a unit of ​ (a)   . The kilogram, kg is a unit of ​ (b)   .

• weight
• mass

which equation is correct?

• density=mass x volume

• density= weight x volume

• mass = density x volume

• weight= density x volume