Unit 2
A race car driver travels 300 meters west in 13 seconds. What is the cars velocity?
23.08 m/s west
A 5.6 kg gun fires a .043 kg bullet with a force of 9600 N onto the bullet. What is the acceleration of the bullet?
223255.8 m/s2
A child is pushing a 17 kg wagon by applying a force of 250 N on the wagon handle at an angle of 37 degrees. what is the horizontal component of the 250 N forces?
199.66 N
A soccer player kicks a ball straight up. the ball returns to its original height 6.7 seconds after it was kicked. how high did the ball go?
55.05 m
A car with a mass of 1500kg traveling west at 75 m/s when it hits a stationary car head on. What is the magnitude of the impulse applied to the car?
-112500 kgm/s
A snowboarder starts the ski slope at a velocity of 27 m/s, he comes to an abrupt stop after hitting an object 21 seconds later. What is the snowboarder's acceleration?
-1.9 m/s2
A person is exerting 30 N onto a 100 kg bed while pushing it across the room. What is the magnitude of the force exerted by the bed onto the person?
30 N
A block weighing 50 N is on a friction less plane inclined at 22o above the horizon. Determine the magnitude and direction of the acceleration
3.6 m/s down the incline
A boat travels south across a 25 m wide river at 15 m/s. The river has a current of 4 m/s east. What is the boats velocity as it crosses the river?
15.52 m/s
A 55kg girl walks 20 meters in 25 seconds, her average momentum is?
44 kgm/s
A rocket starts from a standstill and needs to reach 460 m/s to reach a distance of 832 meters in the sky. How much time does this take?
3.62 s
A woman applies a force of 5000 N on a gas pedal to reach the speed she wants to be at. The mass of the car is 2000 kg. what is the acceleration of the car?
2.5 m/s2
A 25 Newton force is applied to a 10 kg wooden box to push it across a wooden horizontal floor at a constant velocity of 3.0 meters per second to the right. What is the magnitude of force of friction on the box.
29.43 N
A ball rolls at 6.8 m/s off a 2.3 m high table. How long will the ball be in the air for?
.68 s
Two friends sitting on skateboards initially at rest push off each other. One girl (65kg) moves left at 8 m/s.If the other girl is 75 kg, what is her speed as she moves right?
6.93m/s
What is the man's velocity after he fell 580 meters from an airplane while skydiving? (neglect air resistance)
106.69 m/s
A rubber tire that has a Fg of 56.7 N skids at a constant velocity across a wet asphalt road. What is the force of friction acting on the tire?
30.05 N
What is the force needed to stretch a spring with a constant of 120 N/m and a length of .6 m?
72 N
A cannon fires a cannon ball giving it a speed of 17 m/s at an angle of 23 degrees to the ground. What is the maximum height reached by the cannon ball?
2.27 m
An object traveling at 23 m/s has a momentum at 98 kgm/s. Calculate mass
4.26 kg
A woman walks from her house to a restaurant in the town over. It takes her 2 hours. She walks 1000 meters to the restaurant. What is the magnitude of the woman's velocity in meters per second?
.14 m/s
A volleyball player passes the ball with a force of 78 N. The ball is hit at an acceleration of 20 m/s2. What is the mass of the ball?
3.9 kg
Find the weight of a 25 kg table standing on the surface of the earth.
245.57 N
A track star sprints around a 200 m track in 25 seconds. What is the average speed of the runner?
8.0 m/s
A 250kg car is traveling east at 10 m/s. What will be the cars velocity after a 3500N westward impulse is applied to the car?
-4 m/s