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An object of weight Fg is on a plane inclined at an angle of 𝜃𝜃 to the horizontal as shown. Which of the following options correctly state the components of the weight in the plane of the coordinate axes shown in the diagram?
A block slides up and then down a rough incline. Which of the following graphs could represent the velocity of the block as a function of time? All graphs take uphill as the positive direction.
A stone X is thrown vertically upwards with speed v from the top of a building. At the same time, a second stone Y is thrown vertically downwards with the same speed v. Air resistance is negligible.
Which one of the following statements is true about the speeds at which the stones hit the ground?
A car has a mass m. A person pushes the car with a force F in order for the car to have an acceleration of a. The person then pushes the car with a force 2F to achieve an acceleration of 3a.
Which expression is equal to the constant resistive force opposing the motion of the car?
A ball X moving horizontally collides with an identical ball Y that is at rest. Ball X strikes ball Y with a velocity v. Which of the following is a possible outcome of the collision?
The graph below shows how the magnitude of the resultant force acting on an object changes as the object moves a distance x. The object is initially at rest.
Which of the following describes how the kinetic energy and the acceleration of the object change with distance?
A box is pushed with a force of 3 N for 2 s along a frictionless track as shown.
The graph represents the velocity of the box vs time.
How much work is done by the force acting on the box?
A positive point charge Q1 and a negative point charge Q2 of equal magnitude are held at fixed positions. Y is halfway between Q1 and Q2.
Which of the following combinations gives the direction of the net electric field due to the charges Q1 and Q2 at positions X, Y and Z?
A battery with internal resistance is connected to a fixed resistor. A voltmeter is connected across the battery.
The battery is replaced by one with the same emf but with a larger internal resistance.
What happens to the reading on the voltmeter and the current through the fixed resistor?
Four loops of wire move with velocity v near a long straight conductor carrying a current I as shown in the diagram.
Which loop will have an induced anti-clockwise current?