Acceleration
A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 hour. Find the car’s average acceleration.
10 km/hr/hr
What is displacement?
Straight-line distance from initial point to final point.
What is the difference between vector and scalar?
Scalar has only magnitude and vector has both magnitude as well as direction.
Define speed and give its unit.
How fast something is moving; m/s.
Define velocity.
Speed in a given direction.
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
6 m/s2
Ryan is running 30 m South, 50 m North, and 20 m West. What is his distance?
100 m
Is the following a scalar or vector quantity and why?
4 m
Scalar because there is no direction.
Is speed a vector or scalar quantity?
Scalar
Is velocity a scalar or vector quantity?
Vector
A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s average acceleration?
2 m/s2
Ryan is running 30 m South, 50 m North, and 20 m West. What is his displacement?
0 m
List four types of vector quantities.
Velocity, Displacement, Acceleration, and Momentum
What is the mathematical formula for speed? What are the units?
S = d/t
m/s
An object travels 15 miles South in 0.5 hours. What's the velocity?
30 m/hr?
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 25 m/s. But 60 seconds later, at the bottom of the slope, its speed is 350 m/s. What is its average acceleration?
5.4 m/s2
A car drives 14 miles south, 3 miles east, and then 14 miles north. What is the cars distance? Displacement?
Distance = 31 miles
Displacement = 3 miles east
Which of the following is a scalar quantity?
Acceleration
Force
Displacement
Distance
Distance
What is the speed of a car if it travels 300 m in 67 seconds?
4.48 m/s
What is the velocity of a car that drove 700 m east in 54 seconds?
12.96 m/s east
A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration ? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?
Yes, the cyclist acceleration is higher by 1.08 m/s/s.
Cyclist: 2.67 m/s2
Car: 3.75 m/s2
A car drives 320 miles east and then 227 miles north. What is the car's distance? Displacement?
Distance = 547 miles
Displacement = 392.34 miles NE
Define whether the following are vector or scalar:
Weight
Acceleration
Distance
Displacement
4 km/hr
Weight: scalar
Acceleration: Vector
Distance: Scalar
Displacement: vector
4 km/hr: scalar
What is the distance a person ran in 48 seconds if their speed was 3.2 m/s?
153.6 m
What type of graph depicts an object's velocity?
Distance vs. Time graph