Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to
follow a straight-line path
100
A block is dragged at constant velocity in a straight-line path across a level surface by a force of 6N. What is the force of friction between the block and the surface?
6 N
200
The average speed of a horse that gallops a distance of 10km in a time of 30 min is (km/hr)
20 km/hr
200
A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. this best demonstrates that
the milk carton has inertia
200
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
0 N
300
A heavy object and a light object are dropped at the same time in a vacuum. How do they land?
They land at the same time
300
A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. the rock hits the floor
exactly below the midpoint of the ceiling.
300
hang from a pair of gym rings and the upward support forces of the rings will always
add up to equal your weight
400
What is velocity
speed with direction
400
A person in a head-on car collision, who is not wearing a seat belt, continues to move forward at the original speed of the car because of
inertia
400
A man weighting 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is
400 N
500
A mail truck takes 20 seconds to move between mailboxes that are 10m apart. What is the average speed of the mail truck?
0.5 m/s
500
Newton's First Law states
an object in motion stays in motion and an object at rest stays at rest unless acted on by an outside force.
500
When a woman stands at rest with two feet on a scale, the scale reads 500 N. When she gently lifts one foot, the scale reads