Kinematics
Speeds show how fast an object is moving, otherwise known as a ______; And vectors show how fast and object is moving and the motion's direction, otherwise known as a ______.
What is scalar and vector?
True or False: Under no circumstances will a net forcing acting upon an object alternate its locomotion. Explain
What is false. A net force acting upon an object will change its motion. When applied, a net force will cause the object to either speed up, slow down or change its direction entirely.
______ is the capacity of a physical system to do ____.
What is Energy and work?
You are a 125kg baseball player chasing a pop fly. You are running at a speed of 6.31m/s, but you accidently run into the cement wall and experienced a backward force of 1.53x10^4 N for 6.23x10^-2 s. What is your final speed (m/s)?
What is 1.32 m/s?
If a wheel is moving clockwise and has a negative angular acceleration, is the wheel slowing down or speeding up?
What is speeding up?
A family is going on vacation. Their car is moving at a constant speed of 50.km/h. If the destination is reached in 3.0 hours, how many miles did they travel? (1km=.6214mi)
What is 93mi?
A 20kg box rests on a horizontal surface. What is the acceleration of the system if a force of 60N is applied and the coefficient of kinetic friction is .10?
What is 2.02 m/s^2
How much work is required to accelerate a 15500kg bus from 10. m/s to 25 m/s?
What is 4.0x10^6 Joules?
Recreating the arts of the stone age you are throwing rocks at 250g objects that are approaching you on a frictionless surface at 4.2m/s. The rock you threw weighed 15.0g and has an initial speed of 45m/s, causing it to pass through the object. Calculate the rock's speed after passing through the object (m/s).
What is 25m/s?
A wheel is spinning at a constant angular speed of 30. rad/s. How many revolutions will the disk go through in a span of 2.0 minutes?
What is 570 revolutions?
A runner accelerates from a speed of 1.4m/s to 7.1m/s in 6.0 seconds. What is the runners average acceleration?
What is .95m/s?
A friend has passed out drunk while studying for their physics final. Your friend weights 103kg and has face planted into the ground. With a coefficient of static friction being .225 between him and the floor, what is the max force that you can apply to him horizontally to where he will not move?
What is 227 Newtons
How much work is on a system that has a 10. Newton force pointing north and a displacement 2.0 meters south?
What is -20. Joules?
It is the middle of July and you are coming back from Turlock through mosquito invested terrain. While driving, the mosquitos flying in your way smash against the front of your car. In this instance which undergoes the greatest change in momentum
(A) Car (B) Mosquito (C) Both are the same
What is answer choice "C"? Only the acceleration and velocity can change between the two object. According to Newtons 3rd law every force has an opposite and equal force meaning that in this case the momentum is equally changed for both objects.
A wheel with a radius of 2.0 meters spins at a constant angular speed of 24 rad/s. How far along the ground will the wheel travel at this rate in 5.0 minutes?
What is 14,400 meters?
A father is in a tree 16.5ft of the ground trying to retrieve his sons ball. He drops the ball straight down to the ground after retrieving it. How long did the ball take to hit the ground in seconds?
What is 1.01s?
A dirt bike traveling through the mountains has a mass of 215 pounds. The biker starts from rest and then speeds to 62km/h in 15 seconds. A) What is the acceleration of the dirt bike? and, B) What is the net force applied on the bike? (1 pound = .4536kg)
A) What is 1.15 m/s^2
B) What is 112 Newtons
A theme park has a swinging pirate ship ride. If the 1000. kg pirate ship swings from the highest point in its arc, 15 meters from its lowest point, to the lowest point, what is its final velocity?
What is 17 m/s?
A 12kg super banana is resting on your frictionless countertop. You apply a constant force of 25N for 10 seconds...(A)What is the impulse acting on the banana and (B)what is the change in momentum of the banana?
(A) What is 250 N*s?
(B)What is 250?
A disk speeds up from rest at a constant rate of 3.0 rad/s^2. What is the final angular speed of the disk after 20. seconds and how many revolutions will the disk go through during this time period?
What is 30. rad/s and 95 revolutions?
A toy car drives off a 1.10m tall counter with an initial speed of 3.30m/s. How far from the counter will the toy car land if there is no air resistance?
What is 1.56m?
You and your buddies are on the lake tubbing. The boat is initially at rest but you apply an acceleration of (-2.86i + 1.335k). The mass of the boat is 2.15x10^3 kg and the mass of the person tubing is 200 pounds. A) In vector form, determine the net force acting on the boat. B) What amount of force is the person tubing experiencing in vector form?
A) (-6.15x10^3(i) + 2.87x10^3(k))
B) (-259.5(i) + 121.1(k))
A 10.0 kg block compresses a horizontal spring (K = 310. N/m) by 3.10 m beyond its natural length. What is the speed of the block as soon as its released from the spring? If there is a hill in front of the block, how high up the hill will the block go after it is released from the spring?
What is 17.3 m/s and 15.2 meters?
A 20kg crate slides on a frictionless horizontal surface at 13m/s. It collides into another 16kg crate at rest. What is the final speed if the 2 crates slide together after the collision?
What is 7.22m/s?
A disk with a diameter of 100. cm speeds up from 15. rad/s to 35. rad/s in 4.0 seconds. How many revolutions will the disk go through during that time period? What is the average angular and linear acceleration of the disk?
What is 16 revolutions, 5.0 rad/s^2, and 2.5 m/s^2 ?