1 D Motion
If an object has a constant velocity, what can be said about its acceleration?
What is Its acceleration must be zero ?
A 5000kg truck and a 1000kg car are travelling at constant speeds and then collides. What is true about the Forces and acceleration on each?
Since they are moving with a constant velocity, the Forces on each of them are equal. But the 1000kg car will have greater acceleration since it has less mass.
Which of the following measurements is NOT a Scalar?
What is Velocity?
A tennis ball with a mass of 0.2 kg is thrown upwards from the ground at a velocity of 30 m/s. What is the height of the ball when it has a velocity of 20 m/s?
What is 45 m?
What is the kinetic energy of a 60 kg man running at 8 m/s?
What is 1920 J?
You are riding your bike downtown at a speed of 15 m/s and you see a red light ahead. You gently brake over a distance of 50 m and come to a complete stop. What is your acceleration during this time?
What is a= -2.25 m/s2 ?
Kids were playing with balls which are of equal mass. They kicked them with different forces. Which one accelerated more?
Red ball – 10N
Blue ball – 3N
Yellow ball - 5N
Red ball since force and acceleration are directly related.
A toy car drives horizontally off a 1.5 m tall counter at a speed of 3.0 m/s
A) How long will it take the car to reach the floor?
B) What will be the car's velocity just before it hits the floor?
What is t = .53 s?
What is V= 6.2 m/s?
What is the momentum of a 0.12 kg bullet that has a velocity of 800 m/s?
What is 9.6 kg m/s?
For the path PQQR in a conservation force field, the amounts of work done in carrying a body from P to Q from Q to R are 5 J and 2 J, respectively. The work done in carrying the body from P to R will be?
What is 7 J?
A truck starting from rest accelerates at a constant rate of 5m/s2. What is the velocity of the truck after it has traveled 102ft?
What is Vf= 17.64 m/s ?
A car moving at 20.0 m/s collides with a brick wall. The front of the car collapses on impact by a distance of 0.85 meters. If the mass of the car is 1300 kg, what was the magnitude of the force the brick wall exerted on the car?
What is FBC=3.1 x 105N ?
A diver jumps from a diving board that is 4.5 m above the water, jumping up and forward at an angle of 75 degrees above the horizontal with an initial velocity of 3.4 m/s. What is the diver's final velocity as she enters the water? (Air resistance is negligible)
What is V2 = 10 m/s ?
If a .145kg baseball has a momentum of 4.0kg m/s, what is the velocity of the ball?
What is 28 m/s ?
Under the action of a force a 2 kg body moves such that its position (x) as a function of time (t) is given by x = t3/3 , where is x is in metre and t in seconds. The work done by the force in the first two seconds is?
What is 16 J?