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Motion and Force
physical science
Question | Answer |
---|---|
What is any change in velocity (speed or direction) of an object's motion called? | acceleration |
What is the measure of an object's change in position during a certain amount of time? | speed |
What is a push or a pull called? | force |
What is the location of an object called? | position |
What force acts to pull all objects down to the Earth? | gravity |
What is motion? | an object that is changing its position |
What natural force acts against the direction of an object's motion and causes it to slow or stop? | friction |
What is velocity? | the speed of an object in a particular direction |
When you roll STRAIGHT down a hill at the SAME speed, what is changing? | position |
The surrounding objects used to describe and compare the changing of position is called __________. | frame of reference |
In order to calculate speed, you need what two units? | distance and time |
Every motion has a __________. | speed |
When cars change their direction to go around a curve and their speed remains the same, what changes? | velocity |
What can forces do? | start and stop motion of objects, change direction and speed of objects |
What are the 2 natural forces that change motion? | gravity and friction |
What type of surfaces have more friction and cause objects to slow down or stop? | rough surfaces such as grass, carpet, and cement |
What type of surfaces have less friction and cause objects to move more? | smooth surfaces such as tile, hardwood floor, and ice |
How is gravity different with objects of more mass compared to objects of less mass? | objects with more mass require a stronger gravitational pull than objects of less mass |
What are the 3 ways acceleration can occur? | slowing down and stopping, speeding up, changing direction |
How do you calculate the speed of an object? | distance divided by time |
How do you calculate the distance an object traveled? | speed multiplied by time |
How do you calculate the time it took an object to travel a certain distance? | distance divided by speed |
If a person walks for 5 hours and travels a distance of 20 miles, how fast are they walking? | 4 mph.....Speed = Distance divided by Time so 20 miles divided by 5 hours equals 4 mph. |
If a horse galloped 20 miles per hour for 2 hours, how far did the horse go? | 40 miles....Distance = Speed multiplied by Time so 20 mph times 2 hours equals 40 miles. |
How long would it take a camel in the desert to travel 22 miles going 2 mph? | 11 hours....Time = Distance divided by Speed so 22 miles divided by 2 mph equals 11 hours |
What is the speed of a boat traveling 30 miles in 3 hours? | 10 mi/hr....Speed = Distance divided by Time so 30 miles divided by 3 hours equals 10 miles per hour (mi/hr) |
A car travels 400 miles, heading north in 4 hours. What is the car's velocity? | 100 mi/hr N.....Speed = Distance divided Time so 400 miles divided by 4 hours equals 100mi/hr N |
Timmy ran for 1 mile at a speed of 7 min/mi. How long did it take Timmy to run 6 miles at the same rate? | 42 minutes |