Distance/Displacement
Displacement is a vector meaning it has _____________ and ______________.
Magnitude and direction
What is the average velocity, in km per hour, of a car that travels 30. kilometers due west in 0.50 hour?
60 km/hr
One of Newtons' law states that an object at rest will remain at rest, and an object in motion will remain in motion, unless acted upon by an unbalanced external force. Which law is this?
Newton's 1st law (Law of inertia)
What are the proper units for momentum?
kg*m/s
Maria walked 4 meters directly east and then turned and walked 3 meters south. What is her displacement?
5 meters southeast
A car, initially traveling at 25 meters per second, is uniformly brought to rest as the brakes are applied over a distance of 40. meters. The magnitude of the average acceleration of the car while braking is ....
7.8 m/s2
If the force that a baseball bat exerts on a ball is 50. Newtons, then the force that the ball exerts on the bat is
50 Newtons
The momentum of an object is the product of its ___________ and ____________.
mass and velocithy
A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second interval?
2.5 m/s
In a drill during basketball practice, a player runs the length of the 30.-meter court and back. The player does this three times in 60. seconds. What is the average speed of the player during this time?
3.0 m/s
What equations from your reference table represents Newton's 2nd law?
F = ma
A 5.00-kilogram block slides along a horizontal, frictionless surface at 10.0 meters per second for 4.00 seconds. The magnitude of the block's momentum is
50 kg*m/s
A baseball player runs 27.4 meters from the batter's box to first base, overruns first base by 3.0 meters, and then returns to first base. How much larger is the players' distance compared to his displacement?
6.0 m
Two cars, A and B, are 400. meters apart. Car A travels due east at 30. meters per second on a collision course with car B, which travels due west at 20. meters per second. How much time elapses before the two cars collide?
8.0 s
The same net force is applied to object A and object B. The mass of B is three times greater than the mass of A. Compared to the acceleration of A, the acceleration of B is
1/3 A
At the circus, a 100.-kilogram clown is fired at 15 meters per second from a 500.-kilogram cannon. What is the recoil speed of the cannon?
3.0 m/s
A runner sprints full speed around a circular track with a radius of 55 m. She gets halfway around the track before she stops. Determine the magnitude of her distance AND her displacement.
173 m and 110 m
A 5.0-kilogram sphere, starting from rest, falls freely 22 meters in 3.0 seconds near the surface of a planet. The acceleration due to gravity near the surface of the planet is approximately....
4.9 m/s2
A net force of 10. Newtons accelerates an object at 5.0 meters per second squared. What net force would be required to accelerate the same object at 1.0 meter per second squared?
2.0 N
A 0.500-kilogram cart traveling to the right on a horizontal, frictionless surface at 2.20 meters per second collides head on with a 0.800-kilogram cart moving to the left at 1.10 meters per second. What is the magnitude of the total momentum of the two-cart system after the collision?
0.22 kg*m/s