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PRE-TEST in General Physics 1 (2ND QUARTER)
Quiz by Mark Paulo San Juan
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
​A body remains stationary on an inclined plane. Which of the following correctly describes the frictional force on the body and the resultant force respectively?
down the plane; zero
up the plane; zero
zero; down the plane
zero; vertically downwards
A body remains stationary on an inclined plane. Which of the following correctly describes the frictional force on the body and the resultant force respectively?
Which of the following is not a valid example of action and reaction to which Newton's third law of motion applies?
Three blocks of masses 2.5 kg, 1.5 kg and 2.0 kg on a smooth surface are connected by two inelastic strings and pulled by a force of 15.0 N. The tensions in the strings connecting the blocks are T1and T2. What are the values of the tension T1and T2?
Two bodies P and Q of different masses on a smooth table are connected by a light elastic string. A person pulls P and Q apart, and then release them. Which of the following is of the same magnitude for both P and Q?
A load of weight Whangs from 2 ropes as shown in the figure. The tensions in the rope are T1and T2.Whichtriangle represents the equilibrium of the three forces W, T1and T2?Â
A stone at the end of a string is whirled in a horizontal circle on a smooth surface with increasing speed. If the string snaps when the stone is at P as shown in the figure, in which direction would the stone move?
A car of mass 2200 kg goes round a bend which has a radius of curvature 50 m. The coefficient of static friction between the tires of the car and the road is 0.70. At what maximum speed is the car able to go round the bend without skidding?
A ball is dropped from a height and falls freely. The gain in kinetic energy of the ball is______________________.
A ball of mass 0.50kg is thrown vertically upwards with a speed of 12.4 m/s. After rising to a height of 0.50 m, its speed is 7.0 m/s. What is the value of the average air resistance?
A constant force acts on a body which is initially at rest, but is free to move. By neglecting friction, which of the graphs best represents the power P supplied to the body with time t?
A box of mass 10 kg is carried in a lift from level 1 to level 10 of a building. If the vertical distance between two levels is 3 m, calculate the work done on the box.
In which of the following situation work is done?
Which of the following has the LEAST amount of momentum?
Before striking the pins, A bowling ball has 50 kg m/s of Momentum. Afterwards, the bowling ball slows and has a momentum of only 20 kg m/s. What is the Impulse of the bowling ball system?
Two objects are stuck together and are not moving. An explosion rips the two apart. One piece with amass of 250 kg goes right at 25 m/s. What is its momentum?
A hummer strikes a nail with _______ force for 0.2 seconds. If the total Impulse added to the system is 20 Ns, then how much force did the hammer apply to the nail?
Two billiard balls approach each other with the same speed. If they collide in a perfectly elastic collision, what would be their velocities after collision?
Two ice skaters stand together. They “push off” and travel directly away from each other, the boy with a velocity of 1.50 m/s. If the boy weighs 735 N and the girl, 490 N, what is the girl’s velocity after they push off? (Consider the ice to be frictionless.)
A moderate force will break an egg. However, an egg dropped on the road usually breaks, while one dropped on the grass usually doesn’t break. This is because for the egg dropped on the grass:
The impulse experienced by a body is equal to the change in its:
In certain martial arts, people practice breaking a piece of wood with the side of their bare hand. Use your understanding of impulse to explain how this can be done without injury to the hand.
A 25 kg. girl is riding with a velocity of 5 m/s the East. What is the total momentum of the girl?
During a lab experiment a student collides one car into another and observes that they stick together. What answer best describes the momentum, kinetic energy, and velocity change?
A ball moving 5m/s collides with a a second ball at rest. If the collision is elastic which of the following statements best describes the balls after the collision?
A rocket is propelled into the air by ejecting hot gas in the opposite direction. This is an example of what law of physics?
What is the force exerted on an object if it is hit by a 5,000 kg truck moving 3m/s for a time of 2 seconds?
Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?
Sometimes tectonic plates do not move easily past one another, and the plates become stuck. Forces build up, and when the plates finally move, tension is released, as shown below. The sudden movement of the plates is caused by —
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 75 N to the right and you push with a force of 25 N right. What is the net force on the couch?
Student A wants to build a racetrack that will allow his toy cars to travel fast when force is applied. Which material should he use?
