A boat is traveling at a velocity of 50Km/hr, South. If it encounters a current with a velocity of 30Km/hr, South, What is the velocity of the boat with respect to an observer on the shore?
80km/hr
100
Explain Newton's 2nd Law
The amount of force needed to move an objects depends on its mass and its acceleration
100
A basketball sits in the ball cage in the gym. It remains motionless. Which law is this example representing?
1st
200
Spinning on a chair. Which type of motion is this example representing?
circular motion
200
An apple falling from a tree. Which type of force is this example representing?
Gravitational motion
200
A person is swimming at a velocity of 5Km/hr East. If he encounters a current with a velocity of 2Km/hr West, what is the swimmer's velocity with respect to an observer on the shore?
3Km/hr
200
A tennis ball, 0.314 kg, is accelerated at a rate of 164 m/s2 when hit by a professional tennis player. What force does the player's tennis racket exert on the ball?
51.496 N
200
It is much easier to carry your backpack when it is empty rather than when it is full of textbooks. Which law is this example representing?
2nd law
300
A child walking towards its mom. Which type of motion is this example representing?
straight line motion
300
Pushing a table. Which type of force is this example representing?
applied force
300
A plane is traveling at a velocity of 150Km/hr South. If there is headwind of 30Km/hr, what is the velocity of the plane with respect to an observer on the ground?
120km/hr
300
A speed boat in the water experiences an acceleration of 0.524 m/s2. The boat's mass
is 842 kg. What is the force that the boat's engine's are putting out?
441.208 N
300
A climber pulls down on a rope causing his body to lift upward and rise up along the rope. Which law is this example representing?
3rd law
400
Jumping off from a diving board into the pool. Which type of motion is this example representing?
projectile
400
Rolling a ball on the ground. The ball eventually stops. Which type of force is this example representing?
frictional
400
A plane is traveling at a velocity of 200Km/hr South. If there is side wind of 30Km/hr, West, what is the velocity of the plane with respect to an observer on the ground?
202.23 Km/hr
400
A little boy, mass = 40 kg, is riding in a wagon pulled by a his HUGE dog, Howard.
What is the acceleration of the wagon if the dog pulls with a force of 30 N?
0.75 m/s2
400
Imagine you are in a bicycle and you have to break suddenly. The bicycle stops but you fall forwards. Which law is this example representing?
1st- inertia
500
The only force acting on this type of motion is gravity
projectile
500
The cables that hold a bridge undergo which type of force?
tension force
500
A bird is flying at a velocity of 20Km/hr, North. If there is a side wind of 10Km/hr West, What is the velocity of the bird with respect to an observer on the ground?
22.36 Km/hr
500
What is the mass of a car that has an acceleration of 27m/s2 and a force of 4106 N?
152.07 Kg
500
A boy is going down a slide. As he reaches the bottom, friction causes him to slow down and stop. Which law is this example representing?