The unit symbol (abbreviation) for all units named after persons is usually a. a single capital letter b. a single common letter c. two capital letters d. two common letters A box has a mass of 40 kilograms. In the SI, its weight is written as a. 400 N b. 400 N5 c. 40 kg d. 40 kgs A vector quantity has both magnitude (size) and direction. Which of the following is a vector quantity? a. Speed b. Displacement c. Mass d. Temperature Which pair of measuring instruments can be used to determine the gravitational field strength g at a given location? a. beam balance, stopwatch b. spring balance, beam balance 0. scale, beam balance (:1. beam balance, meter rule Convert 3.6 cm to m. O a. 360 m O b. 0.0036 m O c. 0.036 m d. 36 m the ground at the same time.. How about that. A hammer and a feather were dropped together from the same height on the Moon. The picture appears to show both reaching the ground at the same time. The MOST LIKELY explanation for this is that a. objects do not have mass on the Moon b. the picture was a camera trick . c. there is no gravity on the Moon O d. all objects in free fall accelerate at the same rate In 4.0 s, an object dropped from rest falls a distance of a. 4.0m O b. 40 m C. 20 m d. 80 mThe mass of an object is a measure of its a. momentum p. weight 0. inertia d. energy A ramp makes it easier to move a wheelchair from one level to a higher level mainly because a. ramps can be made short b. ramps are very energy efficient c. ramps can provide much frictional force d. ramps can provide a large normal contact force A hammer head of mass 0.60 Kg and travelling at 4.0 mfs drives a nail into a wood and comes to a stop in 0.02 s. The average force of the hammer on the nail is a. 120 N b. 30 N c. 200 N d. 2.4 N Figure 4.1 Traveller pulling a suitcase along a horizontal floor. In the picture, a traveller pulls the suitcase with a force of 10 N, at an angle of 60 to the floor for a distance of 8 m along the floor. The work done along the distance is O a. 40 Nm b. ONm O c. 600 Nm O d. 80 Nm The equation W = mg is derived from the definition of a a. gravitational field strength b. gravitational potential energy c. work done by gravity d. work done against gravity A 10 kg box is taken from Earth to the Moon where the gravitational field strength is approximately 0.16 that on Earth. What will be the MASS of the box on the Moon? a. 62.5 kg O b. 10 kg O c. 0.016 kg d. 1.6 kg